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Update update_db.py

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This commit is contained in:
Sebastian Raschka 2013-12-02 18:26:19 -05:00
parent 3139a22f38
commit 35fce5c502
1 changed files with 13 additions and 1 deletions
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14
sqlite3/update_db.py
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@ -7,11 +7,23 @@ import sqlite3
conn = sqlite3.connect('zinc_db1.db') conn = sqlite3.connect('zinc_db1.db')
c = conn.cursor() c = conn.cursor()
# update field # update field (no insert if id doesn't exist)
t = ('NO', 'ZINC00895033', ) t = ('NO', 'ZINC00895033', )
c.execute("UPDATE zinc_db1 SET purchasable=? WHERE zinc_id=?", t) c.execute("UPDATE zinc_db1 SET purchasable=? WHERE zinc_id=?", t)
print "Total number of rows changed:", conn.total_changes print "Total number of rows changed:", conn.total_changes
# update, or insert when id does not exist
# here: updates rotatable bonds if record with primary key zinc_id exists,<br>
# else inserts new record an sets purchasable to 0
c.execute("""INSERT OR REPLACE INTO zinc_db1 (zinc_id, rotatable_bonds, purchasable)
VALUES ( 'ZINC123456798',
3,
COALESCE((SELECT purchasable from zinc_db1 WHERE zinc_id = 'ZINC123456798'), 0)
)"""
# delete rows # delete rows
t = ('NO', ) t = ('NO', )
c.execute("DELETE FROM zinc_db1 WHERE purchasable=?", t) c.execute("DELETE FROM zinc_db1 WHERE purchasable=?", t)