Re: [sqlite] Using SQLite by Jay Kreibich (2010 paperback edition)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA512 Hello, On 12/31/13 8:18 AM, Bob Cochran wrote: > I'm working on a tough project that requires me to use Node.js and > SQLite. I'm building a database with SQLite version 3.8.2. > > My question is, would purchasing the book "Using Sqlite" by Jay Kreibich > still be mostly pertinent to SQLite 3.8.x features? Would it be helpful > in the context how Node.js is used? I realize that Mr. Kreibich was > writing the book and bringing it to publication just as Node.js was > being invented in 2009. > > Does anyone know if this book will be updated? > > Or is there a different book title I should look at? - From my personal experience, you don't need a book to learn/use SQLite. It is very well documented and pretty easy to get started. If you are in doubt at anytime, get on the interactive SQLIte console and try out commands directly on the database. > > Right now, my major difficulties seem to be in my own grasp of > asynchronous programming. It is my own deficient grasp of the logic > problems that are biting me; I need to "get it" and understand Node > style programming. An example is: I need to insert two rows to an SQLite > table, but because I'm using non-blocking interface software to do the > actual inserts, and I'm probably using that software incorrectly, only > one insert is being done. You need to do one insert, then in the success callback of the insert, do the second insert. If you use `node-sqlite3`[1], then it allows you to serialize the query execution in which case it is simpler. [1]: https://github.com/mapbox/node-sqlite3 > > Thanks > > Bob Cochran > Greenbelt, Maryland, USA > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users - -- Cheers, Navaneeth -BEGIN PGP SIGNATURE- Version: GnuPG/MacGPG2 v2.0.22 (Darwin) Comment: GPGTools - https://gpgtools.org iQEcBAEBCgAGBQJSwlUyAAoJEHFACYSL7h6kUCwH/0tMAKjgGldSPeXWKyMT3j8t X8br4nLyyxsEUa0xASm6S7jiPrwQ8D1IKEjSu1cbX4AAimZSzeMXnIlwyuKVxF7Q 1NLNknzei/LKM1m+jwRYtC6Pencm4o2Jnrc5kcKBrXAh/M4w6r+7Z1dpBN7LK/wP RZs42203DoV2V4/0FxoBP9OxgdP+AKSYRf4UrOqJM5XZiPVaoi9J43MqRyldwUaU 0n9cTlGzFqgKMxyQgq4cqoQKM9BztvAxkq5jU72FJHXg/3N6tJennL/ACrf2qkff G5rSdb0SDOUAvajy8cybRj90F2e3E+3C6uvrph7UdD/86A4PitzKnezFw2y72L4= =gKGL -END PGP SIGNATURE- ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Using SQLite by Jay Kreibich (2010 paperback edition)
I'm working on a tough project that requires me to use Node.js and SQLite. I'm building a database with SQLite version 3.8.2. My question is, would purchasing the book "Using Sqlite" by Jay Kreibich still be mostly pertinent to SQLite 3.8.x features? Would it be helpful in the context how Node.js is used? I realize that Mr. Kreibich was writing the book and bringing it to publication just as Node.js was being invented in 2009. Does anyone know if this book will be updated? Or is there a different book title I should look at? Right now, my major difficulties seem to be in my own grasp of asynchronous programming. It is my own deficient grasp of the logic problems that are biting me; I need to "get it" and understand Node style programming. An example is: I need to insert two rows to an SQLite table, but because I'm using non-blocking interface software to do the actual inserts, and I'm probably using that software incorrectly, only one insert is being done. Thanks Bob Cochran Greenbelt, Maryland, USA ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Web application with SQLite
Understood. Thanks * Mohd Radzi Ibrahim [131229 13:54]: > fossil is a webserver by itself with sqlite as the database engine. AFAIK, > there's no scripting language used on the server. All written in C. > > > > On Mon, Dec 30, 2013 at 1:02 AM, Tim Johnson wrote: > > > * Stephan Beal [131229 07:48]: > > > On Sun, Dec 29, 2013 at 5:35 PM, Tim Johnson wrote: > > > > > > > :) And if I request http://www.sqlite.org/src/timeline/index.php > > > > I get the same page, so Igor, Mr. Hipp uses PHP as the 'querying' > > > > code, or so I presume. > > > > > > > > > > LOL! If you try /timeline/foo/bar/baz you'll get the same thing. That > > page > > > is written in C. The /timeline part of the request is intercepted by C > > code > > > and the rest is ignored. > > > > > > http://fossil-scm.org/index.html/timeline/foo/bar/baz > > I stand (embarrassingly) corrected > > > > FYI: I started out doing web programming in 1995 using C, but > > transitioned to scripting languages around 2001. I didn't know > > anyone was still doing web application in C! > > > > It stands to reason in terms of performance, for sure. > > > > Thanks > > -- > > Tim > > tim at tee jay forty nine dot com or akwebsoft dot com > > http://www.akwebsoft.com, http://www.tj49.com > > ___ > > sqlite-users mailing list > > sqlite-users@sqlite.org > > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users -- Tim tim at tee jay forty nine dot com or akwebsoft dot com http://www.akwebsoft.com, http://www.tj49.com ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Windows Embedded Handheld 6.5
Ryan Finnesey wrote: > > If I want to add a SQLite database to an application I am developing to run > on Windows Embedded Handheld 6.5 do I need to compile the SQLite Source Code > or do I just use System.Data.SQLite > Unless you need custom compilation options, it will probably be easier just to use the System.Data.SQLite binaries for "PocketPC", seen here under "Precompiled Binaries for Windows CE (.NET Compact Framework)": https://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wiki -- Joe Mistachkin ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Is that same between rebinding every parameter and
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 30/12/13 06:18, Igor Tandetnik wrote: > sqlite3_clear_binding is very rarely needed, in my experience. In fact, > I have not yet encountered a reason to use it. I use it in my Python wrapper (APSW). The reason is because I have an automatic statement cache. The bindings are cleared before being putting the statement into the cache to free up any memory (they could have large blobs or strings) and to make the state of the statement being taken out of the cache match that of the same one freshly prepared exactly. I am of the opinion that SQLite should have a statement cache built in rather than everyone having to implement their own: https://www.sqlite.org/src/tktview?name=ee4b2b48f5 Roger -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.14 (GNU/Linux) iEYEARECAAYFAlLB3aYACgkQmOOfHg372QSsFgCgwLkmzGqOrVL9YRLy6gG1E/cC W+4An1ZFo5njgI0V3i6IAVMrubdGMdQv =Linf -END PGP SIGNATURE- ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] How to get data between two dates in SQLite with C#?
On 30 Dec 2013, at 1:08am, Fatih BURAL wrote: > My name is Fatih, I'm having a trouble about getting data between two > different dates in SQLite with C# code. Things that usually trip up people trying that: * SQLite doesn't have a DATE type. You are actually storing INTEGER REAL or TEXT and should declare any timedate columns like that. * If you are doing maths on the dates then you should consider storing them as numbers, not strings. If instead you are mostly storing the dates and retrieving them for display then it's probably simpler just to store them as strings. * If you are relying on SQLite's functions to process dates in the form "-MM-DD HH:MM:SS" then your dates must be in exactly that format. Four digits for the year, two digits for everything else, with all punctuation in the right place. "SELECT * from TABLE t where t.Date1 >= @0 AND t.Date2 <= @1", date1.ToString("-MM-dd HH:mm:ss"), date2.ToString("-MM-dd HH:mm:ss") Looking at the above, I suspect that your values 't' break one of the above rules. I assume that "date1" and "date2" are strings in your programming language and that you've tested that your "ToString" function does have the results you're expecting. You might usefully use the shell tool to do something like SELECT Date1, typeof(Date1), Date2, typeof(Date2) FROM t and check to see that your date fields do have dates at least ten characters long with "-" signs in the right place. Another way to look at the problem is just to forget that it concerns dates at all. You're comparing three strings and your code should work for any strings in alphabetic order. Simon. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Windows Embedded Handheld 6.5
If I want to add a SQLite database to an application I am developing to run on Windows Embedded Handheld 6.5 do I need to compile the SQLite Source Code or do I just use System.Data.SQLite http://system.data.sqlite.org/index.html/doc/trunk/www/index.wiki The development environment is C# .net compact framework 3.5 and Windows Forms. Windows Embedded Handheld 6.5 is based on Windows Mobile 6.5.3 Thanks for your feedback and help. Cheers Ryan ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Will It be a Problem that link to 3.7.17 but run on 3.8.2
On 12/30/2013 10:43 PM, narkewo...@gmail.com wrote: Hi, If I have my code compiled/linked agaist a 3.7.17 library on my development host but run on a target that in fact installed with 3.8.2 library on my target, will it be a problem? More specifically, will it lead to database file corruption? Should be fine. No extra chance of database corruption. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Will It be a Problem that link to 3.7.17 but run on 3.8.2
Hi, If I have my code compiled/linked agaist a 3.7.17 library on my development host but run on a target that in fact installed with 3.8.2 library on my target, will it be a problem? More specifically, will it lead to database file corruption? Thanks in advance. -woody ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] How to get data between two dates in SQLite with C#?
Hi Fatih, not tested, but this should work and is I think what you want. Good luck. "SELECT * from TABLE t where t.Date1 >= @0 AND t.Date2 <= @1", date1.ToString("-MM-dd HH:mm:ss"), date2.ToString("-MM-dd HH:mm:ss") -Original Message- From: sqlite-users-boun...@sqlite.org [mailto:sqlite-users-boun...@sqlite.org] On Behalf Of John McKown Sent: December-30-13 08:05 To: General Discussion of SQLite Database Subject: Re: [sqlite] How to get data between two dates in SQLite with C#? Fatih, I think you'll need to show some code and what it is doing (i.e. I do "..." and I get "...", but I want "...") before anyone can really help you. On Sun, Dec 29, 2013 at 7:08 PM, Fatih BURAL wrote: > Hi, > > My name is Fatih, I'm having a trouble about getting data between two > different dates in SQLite with C# code. I tried all the ways even I > asked questions about this situation to some MVPs but I didn't solve > it. I want to use SQLite but if I don't solve this query I will have > to use SQLCE or something that I don't like to use. > > Could you please help me to solve that problem? > > > > Teşekkürler & Saygılar > Thanks & Regards > - > Fatih BURAL > > Software Developer > - > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > -- This is clearly another case of too many mad scientists, and not enough hunchbacks. Maranatha! <>< John McKown ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Is that same between rebinding every parameter and
Thanks, Igor. On Monday, 30 December 2013, Igor Tandetnik wrote: > On 12/30/2013 9:14 AM, narkewo...@gmail.com wrote: > >> If I don't call sqlite3_clear_binding but rebind every parameter with >> sqlite3_bind_type before every sqite3_step after sqlite3_reset, will it >> be any different? >> > > No it won't be. sqlite3_clear_binding is very rarely needed, in my > experience. In fact, I have not yet encountered a reason to use it. > -- > Igor Tandetnik > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > -- Life is the only flaw in an otherwise perfect nonexistence -- Schopenhauer narke public key at http://subkeys.pgp.net:11371 (narkewo...@gmail.com) ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Hook / Trigger for Primary Key / Unique Error
SCHEMA : CREATE TABLE checksums (i INTEGER,c VARCHAR(20) PRIMARY KEY) ; CODE : // Generates a Random string QByteArray Randstr_B(int len) { char chars[36] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'}; QByteArray str; for (int i = 0; i < len; i++) { str.append(chars[qrand() % 35]); } return str; } // Converts quint64 to Little Endian bytes QByteArray toLE(quint64 num){ unsigned char bytes[8]; bytes[0] = (unsigned char)num; bytes[1] = (unsigned char)(num >> 8); bytes[2] = (unsigned char)(num >> 16); bytes[3] = (unsigned char)(num >> 24); bytes[4] = (unsigned char)(num >> 32); bytes[5] = (unsigned char)(num >> 40); bytes[6] = (unsigned char)(num >> 48); bytes[7] = (unsigned char)(num >> 56); return QByteArray((const char *)bytes, 8); } insQ->prepare("INSERT INTO checksums (i, c) VALUES (?, ?)"); I then do inserts in the loop (I am using QT) : for(quint64 i = 1; i <= 1000; i++){ // Create the data RANDOMLY QByteArray block = Randstr_B(4088).append(toLE(i)); // "toLE" is a function which converts quint64 to Little Endian Bytes i.e. 8 bytes. I used this to make each block unique QByteArray csum = QCryptographicHash::hash(block, QCryptographicHash::Sha1); unsigned char C = (unsigned char)csum.at(0); // Insert into the MAP insQ->bindValue(0, i); // insQ is a QSqlQuery * insQ->bindValue(1, csum); if(!insQ->exec()){ qDebug() << "Error Inserting :" << i << csum.toHex().toUpper() << insQ->lastError().text(); //exit(0); } if((i % 1) == 0){ mapconn.commit(); // Database Connection "mapconn" Q.exec("PRAGMA wal_checkpoint;"); // Checkpointing the WAL and "Q" is also another QSqlQuery. mapconn.transaction(); // Restarting Transaction qDebug() "Committed :" << i << csum.toHex() << time(); } } ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Hook / Trigger for Primary Key / Unique Error
On Mon, Dec 30, 2013 at 8:56 AM, Raheel Gupta wrote: > Sir, I tested the method of the following : > sqlite3_exec("INSERT OR IGNORE INTO ;"); > if( sqlite3_changes()==0 ){ > sqlite3_exec("UPDATE ..."); > } > I have seen my performance degrade from 1 records / second to 1 > records / 10 seconds after 3 million UNIQUE Checksums inserted. Am I doing > anything wrong ? BTW, there were only 10 CONFLICTS in 3 Million rows. So > they are all unique 20 Byte Sha1 Checksums. I am committing at 1 > inserts. > Why don't you provide us with a test case of some kind, or at least your specific schema and the SQL you are running? -- D. Richard Hipp d...@sqlite.org ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Is that same between rebinding every parameter and
On 12/30/2013 9:14 AM, narkewo...@gmail.com wrote: If I don't call sqlite3_clear_binding but rebind every parameter with sqlite3_bind_type before every sqite3_step after sqlite3_reset, will it be any different? No it won't be. sqlite3_clear_binding is very rarely needed, in my experience. In fact, I have not yet encountered a reason to use it. -- Igor Tandetnik ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Is that same between rebinding every parameter and
sqlite3_clear_binding? Reply-To: Hi, If I don't call sqlite3_clear_binding but rebind every parameter with sqlite3_bind_type before every sqite3_step after sqlite3_reset, will it be any different? Thanks. -woody ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Hook / Trigger for Primary Key / Unique Error
Sir, I tested the method of the following : sqlite3_exec("INSERT OR IGNORE INTO ;"); if( sqlite3_changes()==0 ){ sqlite3_exec("UPDATE ..."); } I have seen my performance degrade from 1 records / second to 1 records / 10 seconds after 3 million UNIQUE Checksums inserted. Am I doing anything wrong ? BTW, there were only 10 CONFLICTS in 3 Million rows. So they are all unique 20 Byte Sha1 Checksums. I am committing at 1 inserts. On Mon, Dec 30, 2013 at 6:38 PM, Richard Hipp wrote: > On Mon, Dec 30, 2013 at 7:48 AM, Richard Hipp wrote: > > > > > The wordcount.c test program does the above using prepared statements and > > exceeds 348,000 inserts+updates per second on my desktop > > > > Further information: My desktop is a relatively new and fast SSD machine. > A 3-year-old ubuntu machine with spinning disks did over 250,000 > inserts+updates per second and a beagleboard black ( > http://beagleboard.org/products/beaglebone%20black) did just shy of 20,000 > inserts+updates per second on the same test case of 791319 insert+updates. > > -- > D. Richard Hipp > d...@sqlite.org > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Hook / Trigger for Primary Key / Unique Error
On Mon, Dec 30, 2013 at 7:48 AM, Richard Hipp wrote: > > The wordcount.c test program does the above using prepared statements and > exceeds 348,000 inserts+updates per second on my desktop > Further information: My desktop is a relatively new and fast SSD machine. A 3-year-old ubuntu machine with spinning disks did over 250,000 inserts+updates per second and a beagleboard black ( http://beagleboard.org/products/beaglebone%20black) did just shy of 20,000 inserts+updates per second on the same test case of 791319 insert+updates. -- D. Richard Hipp d...@sqlite.org ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] How to get data between two dates in SQLite with C#?
Fatih, I think you'll need to show some code and what it is doing (i.e. I do "..." and I get "...", but I want "...") before anyone can really help you. On Sun, Dec 29, 2013 at 7:08 PM, Fatih BURAL wrote: > Hi, > > My name is Fatih, I'm having a trouble about getting data between two > different dates in SQLite with C# code. I tried all the ways even I asked > questions about this situation to some MVPs but I didn't solve it. I want > to use SQLite but if I don't solve this query I will have to use SQLCE or > something that I don't like to use. > > Could you please help me to solve that problem? > > > > Teşekkürler & Saygılar > Thanks & Regards > - > Fatih BURAL > > Software Developer > - > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > -- This is clearly another case of too many mad scientists, and not enough hunchbacks. Maranatha! <>< John McKown ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] How to get data between two dates in SQLite with C#?
Hi, My name is Fatih, I'm having a trouble about getting data between two different dates in SQLite with C# code. I tried all the ways even I asked questions about this situation to some MVPs but I didn't solve it. I want to use SQLite but if I don't solve this query I will have to use SQLCE or something that I don't like to use. Could you please help me to solve that problem? Teşekkürler & Saygılar Thanks & Regards - Fatih BURAL Software Developer - ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Hook / Trigger for Primary Key / Unique Error
On Mon, Dec 30, 2013 at 5:24 AM, Raheel Gupta wrote: > Hi, > > I have the following tables : > CREATE TABLE checksums > (i INTEGER,c VARCHAR(16) PRIMARY KEY) ; > > CREATE TABLE data > (i INTEGER, data BLOB, isUnique INTEGER) > > My application needs to insert 1000s of rows/second into the data table > hence I use transactions and prepare statements. > > Now is it possible that while inserting (using transactions) in the > Checksums table when there is a CONFLICT as per the column "c" I update > table "data" column isUnique with the corresponding ID "i" from table > checksums. > > Something like : > INSERT INTO checksums (1000, "abcdefghijklmnop") ON CONFLICT IGNORE BUT > UPDATE data SET isUnique = OLD.checksums.i > The wordcount.c test program (see http://www.sqlite.org/src/artifact/9915e06cb) demonstrates four different ways to do this. One example: sqlite3_exec("INSERT OR IGNORE INTO ;"); if( sqlite3_changes()==0 ){ sqlite3_exec("UPDATE ..."); } The wordcount.c test program does the above using prepared statements and exceeds 348,000 inserts+updates per second on my desktop when compiled using GCC version 4.8.1 and -Os. See http://www.sqlite.org/src/artifact/9915e06cb?ln=432-445 for the inner loop. > > I know the above ON CONFLICT statement is wrong but I need a similar > functionality. > > Is this possible with HOOKS / triggers or anything at all ? > This will be a great feature if its there. > > Regards > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > -- D. Richard Hipp d...@sqlite.org ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Hook / Trigger for Primary Key / Unique Error
Raheel Gupta wrote: >INSERT INTO checksums (1000, "abcdefghijklmnop") ON CONFLICT IGNORE BUT >UPDATE data SET isUnique = OLD.checksums.i > >Is this possible with HOOKS / triggers or anything at all ? It is possible with the obvious and simple solution: check for uniqueness with a SELECT, then execute either INSERT or UPDATE as needed. Is there any reason that you do not want to use this? Regards, Clemens ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Hook / Trigger for Primary Key / Unique Error
Hi, I have the following tables : CREATE TABLE checksums (i INTEGER,c VARCHAR(16) PRIMARY KEY) ; CREATE TABLE data (i INTEGER, data BLOB, isUnique INTEGER) My application needs to insert 1000s of rows/second into the data table hence I use transactions and prepare statements. Now is it possible that while inserting (using transactions) in the Checksums table when there is a CONFLICT as per the column "c" I update table "data" column isUnique with the corresponding ID "i" from table checksums. Something like : INSERT INTO checksums (1000, "abcdefghijklmnop") ON CONFLICT IGNORE BUT UPDATE data SET isUnique = OLD.checksums.i I know the above ON CONFLICT statement is wrong but I need a similar functionality. Is this possible with HOOKS / triggers or anything at all ? This will be a great feature if its there. Regards ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users