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? ??? ??? MySQL ???? ?????? ???? SQL LIKE ??? ?? Python ??? ??? ???? ????? ??? ?? ????

?????? ???? SQL LIKE ??? ?? Python ??? ??? ???? ????? ??? ?? ????

Dec 19, 2024 pm 09:32 PM

How Can I Correctly Format Python Strings for SQL LIKE Queries with Wildcards?

SQL ????? ? LIKE? ??? Python? ??? ?? ??

?????? ?? SQL ?? Python ??? ???? ? ???? ????? ? ????? LIKE ??? ? ?????? ??? ??? ?? Python ??? ??? ??? ? ???? ???? ??? ?? ???? ?????.

??:

?????? ?? LIKE ??? ?? Python?? MySQLdb? ???? SQL ???? ??? ?? ??? ??????. Python? ?? ??? ???? ??? ??? ????? ??? ??? ?? Python? ? ??? ?? ?? MySQLdb? ?? ???? ??? ?????.

??? ??:

# Attempt 1: Value error due to unsupported escape sequence
"SELECT tag.userId, count(user.id) as totalRows FROM user INNER JOIN\
  tag ON user.id = tag.userId WHERE user.username LIKE '%%s%'" % (query)

# Attempt 2: Returns same error as Attempt 1
"SELECT tag.userId, count(user.id) as totalRows FROM user INNER JOIN\
  tag ON user.id = tag.userId WHERE user.username LIKE '\%%s\%'" % (query)

# Attempt 3: Error from MySQLdb due to insufficient arguments in format string
like = "LIKE '%" + str(query) + "%'"
totalq = "SELECT tag.userId, count(user.id) as totalRows FROM user INNER JOIN\
  tag ON user.id = tag.userId WHERE user.username " + like

# Attempt 4: Returns same error as Attempt 3
like = "LIKE '\%" + str(query) + "\%'"
totalq = "SELECT tag.userId, count(user.id) as totalRows FROM user INNER JOIN\
  tag ON user.id = tag.userId WHERE user.username " + like

???:

??? ??? ??? ???? SQL? ?? ???? ???? ?? ?? ??? ?????.

curs.execute("""SELECT tag.userId, count(user.id) as totalRows 
                  FROM user 
            INNER JOIN tag ON user.id = tag.userId 
                 WHERE user.username LIKE %s""", ('%' + query + '%',))

? ???? ? ?? ??? excute() ???? ?????. ? ?? ??? ????? ???? ?? ?? ???? ?? ???? SQL ??????. ? ?? ??? ??? ??? ???? ???? ?? ????? ???? ???? ?????. ??? ?? ?? ???? ?? ?? ?????? ?????.

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? ??? ?????? ???? SQL LIKE ??? ?? Python ??? ??? ???? ????? ??? ?? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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