] SQLite LIKE question
Cc: tutor@python.org
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Dinesh B Vadhia wrote:
Okay, I've got this now:
con = sqlite3.connect(:memory:)
cur = con.cursor()
cur.execute(CREATE TABLE db.table(col.a integer, col.b text
Dinesh B Vadhia [EMAIL PROTECTED] wrote
I'm using the LIKE operator to match a pattern against a string
using this SELECT statement:
for row in con.execute(
SELECT column
FROM table
WHERE string LIKE '%q%'
limit 25):
With q=dog as a test example, I've tried '$q%', '%q%', '%q'
Simone wrote:
In Python the symbol '%' in a string is a special char: you use it, for
instance, to place a variable inside a string.
For completeness, it's worth mentioning in passing that % is only
special when you're doing string formatting. It's not otherwise
special in strings.
However,
i forgot to mention that you need to try your sql commands out of your
script before trying them inside,
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I m not sure this is your case but i believe you are missing the
cur.fetchall() command which does fetch data from sql db
i suggest you put a print statement for every data you use in your program
that way you know whats empty whats not...
here is example of MySQLdb process:
Dinesh B Vadhia ha scritto:
The second problem is that I'm using the LIKE operator to match a
pattern against a string but am getting garbage results. For example,
looking for the characters q='dog' in each string the SELECT statement
is as follows:
for row in con.execute(SELECT
Okay, I've got this now:
con = sqlite3.connect(:memory:)
cur = con.cursor()
cur.execute(CREATE TABLE db.table(col.a integer, col.b text))
con.executemany(INSERT INTO db.table(col.a, col.b) VALUES (?, ?), m)
con.commit()
for row in con.execute(SELECT col.a, col.b FROM db.table):
Dinesh B Vadhia wrote:
Okay, I've got this now:
con = sqlite3.connect(:memory:)
cur = con.cursor()
cur.execute(CREATE TABLE db.table(col.a integer, col.b text))
con.executemany(INSERT INTO db.table(col.a, col.b) VALUES (?, ?), m)
con.commit()
for row in con.execute(SELECT col.a, col.b
Dinesh B Vadhia [EMAIL PROTECTED] wrote
As Python/pysqlite stores the items in the db.table as unicode
strings, I've also run the code with q=udog but get the same
error. Same with putting the q as a tuple ie. (q) in the Select
(q) is not a tuple, it is a variable surrounded by quotes.
I'm reading a text file into an in-memory pysqlite table. When I do a SELECT
on the table, I get a 'u' in front of each returned row eg.
(u'QB VII',)
(u'Quackser Fortune Has a Cousin in the Bronx',)
I've checked the data being INSERT'ed into the table and it has no 'u'.
The second problem
Dinesh B Vadhia [EMAIL PROTECTED] wrote
I'm reading a text file into an in-memory pysqlite table.
When I do a SELECT on the table, I get a 'u' in front of
each returned row eg.
(u'QB VII',)
The u is not part of the data its Python telling you that
the string is Unicode.
The second
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