How To Pass a Collection/List/Map Through the iBatis to the Database?
I am currenly using JSF as the front end of a J2EE application. Data go through many business logic layers and reach the database through the iBatis. The iBatis is new to me. To pass a query String from the front end to the database and get a Collection back from the database through the iBatis has been tested successful. Now, I have great difficulty to pass a List or a Map through the iBatis to the database? Is it possible to be done? The reason is that a table with thousands of records and each record has many name/value pairs may be sent to update the database. And looping through the table to send Strings may not be a solution. Thank you in advance. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
What Is LIMIT? and How to Use LIMIT?
I saw somebody has MySQL statement this way: StringBuffer sql = new StringBuffer(512); sql.append(SELECT ThreadID, ForumID, MemberName, LastPostMemberName, ThreadTopic, ThreadBody); sql.append( FROM + TABLE_NAME); sql.append( ORDER BY + sort + + order); sql.append( LIMIT ?, ?); What is LIMIT? What those question marks stand for? __ Do you Yahoo!? Yahoo! Small Business $15K Web Design Giveaway http://promotions.yahoo.com/design_giveaway/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
How To Write This SQL Statement
Please help. What is the syntax of idenfying those who do not have addresses (in the address field) in the database? __ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Multiple Roles
In case that a user has multiple roles; for example, John Dole is both author and editor, 1. I should have two rows for John Dole? John Dole author John Dole editor or. I should have only one row and use comma ',' to separate the roles? John Dole author, editor 2. How do I create the table for the second case (see below)? create table user_roles ( user_name varchar(15) not null, role_name varchar(15) not null, varchar(15) null ); __ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Primary Key
I saw an example of creating tables (see below). I wonder what the primary key (user_name, role_name) in the table user_roles means? Does it mean that both user_name and role_name are the primary key of the user_roles table? How does a table have two primary keys? create table users ( user_name varchar(15) not null primary key, user_pass varchar(15) not null ); create table user_roles ( user_name varchar(15) not null, role_name varchar(15) not null, primary key (user_name, role_name) ); __ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Problem With Creating Table
Hi, I tried to create a table. This table has seventeen fields. My create table syntax gets too long and I was only able to specify 5 fields at the mysql prompt in the DOS window (DOS does not accept a command beyond certain length). How do I put the rest 12 fields in the table I just created? mysqlCREATE TABLE message_thread (thread_id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY, message_receiver VARCHAR(79) NOT NULL, message_sender VARCHAR(79) NOT NULL, article_title VARCHAR(255) NOT NULL, last_post_member_name VARCHAR(79) NOT NULL); __ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Create Tables In MySQL
Hi, I have several simple questions regarding creating tables in the MySQL. 1. For a variable of Java primitive int type, I should use INT or INTEGER? Do I have to specify the length of the field? CREATE TABLE message_thread( thread_id INT or INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY); 2. A field in my table is for storing articles. Articles could be very long in variable length. I should use VARCHAR or TEXT? What about the length of the field? 3. For a variable of the Timestamp type, do I specify CREATE TABLE message_thread( thread_creation_date TIMESTAMP NOT NULL ); What about the length of the field? Thanks for your advices in advance. __ Do you Yahoo!? Find out what made the Top Yahoo! Searches of 2003 http://search.yahoo.com/top2003 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
How Do I Insert ...... ?
I have a table 'message' in the MySQL database. To
make it simple; say, I have three fields in that
table: thread_ID, thread_topic, and thread_body.
The thread_ID field is AUTO_INCREMENT; therefore, I do
not insert any value into that column. The value of
that field starts with 1 when the first row is
inserted.
Now, I have the values for thread_topic and
thread_body and want to insert those values into the
'message' table to create the first record in that
table.
1. where and how do I indicate that there is a problem
insert a row into the table 'message'?
2. Do I code this way:
protected static void create(String threadTopic,
String threadBody) throws CreateException,
DatabaseException, ForeignKeyNotFoundException
{
StringBuffer sb = new StringBuffer(512);
sb.append(INSERT INTO + message
+ (thread_topic, thread_body));
sb.append( VALUES (?, ?));
try
{
Connection conn =
DBConnection.getDBConnection();
Statement stmt =
conn.createStatement(sb.toString());
stmt.setString(1, threadTopic);
stmt.setString(2, threadBody);
}
catch(SQLException sqle)
{
sqle.printStackTrace();
throw new DatabaseException(Error executing SQL
in ThreadHelper.create.);
}
finally
{
stmt.close();
conn.close();
}
}
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IDENTITY column
Hi, I am a beginner in using database. And I appreciate your support and help. When we first create a table, 1. is it possible to create a column that identifies each record that is to be inserted? 2. If we can create this IDENTITY column, how do we create it? Do we set a maximum to the value of this column? Or the value simply increases as the number of records get inserted into the table grows? 3. when we try to insert the first record to this table, does this record go to the first row in the table? And the value of the IDENTITY for this record is 1? When we try to insert the second record to this table, does the second record automatically go to the second row in the table? And the value of the IDENTITY is 2? __ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Is It Possible To Change the Value of A Particular Field Manually?
Hi, I am not a database person. I have a database called members. One of the fields in this database is user_name. There are a number of records in this database. Under the field user_name, I would like to make some changes manually; for example, I want to change John Doe to john_doe Is it possible to do it? How do I do it? Thank you very much in advance. __ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
How To Delete A Particular Record From a Table?
Hi, I am new in using database. I have created a table in a MySQL database. I want to delete a record from the members table. The record I want to delete is: user_name=John Smith. I tried: MySQLdelete John Smith from members; it does not work. MySQLdelete username='John Smith' from members; it does not work either. __ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Select Records From the Database
I got null after selecting records from a table in the database. The table is created by me. I know how many records will be selected. Just cannot be null. I cannot help wonder if my SELECT statement is correct - I want records to be selected if user_role is equal to the userrole I supplied AND if journal_category is equal to the category I supplied. My statement is: String query = SELECT user_name FROM members WHERE user_role = ' + userrole + ' AND journal_category = ' + category + '; Do anybody see any mistake? __ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
How To Create An ArrayList From the MySQL database
I have a table members in the MySQL database. I am
going to supply a String editor and search the
members table. All those who are editor will be
picked up and their name will enter the array I want
to create.
How do I code it and return this array?
Here is a sketch of my code. I do not have any
confidence in my code. I tend to creat a bean for
this ArrayList.
EditorBean editorList = null;
try
{
conn = DBConnection.getDBConnection();
stmt = conn.createStatement();
String query = SELECT user_name FROM members
WHERE user_role = ' + userrole + ';
rs = stmt.executeQuery( query );
if ( start = 0 rs.absolute( start + 1 ) )
{
boolean hasNext = false;
List editors = new ArrayList();
do
{
editors.add(new EditorBean(
rs.getString( user_name ) );
} while ( ( hasNext = rs.next() ) (
--count 0 ) );
editorList = new EditorBean( editors,
start, hasNext );
}
else
{
editorList = null:
}
return editorList;
}
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Conditional Search of the Database
I am learning to query the MySQL database artimus_article. My database is a storage of articles with name of the creator, title of the article, the category in which the article is classifies, , etc. I try to search articles by the name of the creator within the computer science category. Are there mistakes in my prepared statement shown below? SELECT * FROM artimus_article WHERE creator LIKE (?) AND category=computer science ORDER BY creator,title; Should I put computer science in a pair of double quote or a pair of single quote? __ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
How To Create Users In MySQL?
I have the MySQL-3.23.55 installed in my PC. Therefore, I am the DBA without the required DBA knowledge. First, how do I create users in the MySQL database? Second, how do I grant table creation privilege to users? Is GRANT ALL PRIVILEGES ON databasename TO someuser IDENTIFIED BY 'somepassword'; the correct command? Thanks for your guidance. __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
