python - How to properly escape %s in sql query -


i have following sql:

sql = '''select distinct artwork_apple_url main_catalog           (artwork_url null or artwork_url not '%s3-%')            union          select distinct artwork_apple_url main_collectioninstance           (artwork_url null or artwork_url not '%s3-%')       ''' cursor.execute(sql)

this gives me formatting error -- how like %s3-%' in sql (s3 part of amazon url).

if use parametrized sql, quoting of arguments done db adapter you. it's easier , helps prevent sql injection. note appropriate placemarker (e.g. %s) depends on db adapter using. %s appropriate mysqldb, ? placemarker symbol used oursql, example.

sql = '''select distinct artwork_apple_url main_catalog           (artwork_url null or artwork_url not %s)            union          select distinct artwork_apple_url main_collectioninstance           (artwork_url null or artwork_url not %s)       ''' cursor.execute(sql, ['%s3-%']*2)

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