if statement with not exists sqlite3 code example
Example 1: sqlite insert if not exists
#id column is assumed to be primary key
INSERT INTO destination_table(id,name)
SELECT id, name
FROM source_table s
WHERE NOT EXISTS (
SELECT 1
FROM destination_table d
WHERE d.id = s.id
);
Example 2: sqlite check if row exists
SELECT EXISTS(SELECT 1 FROM myTbl WHERE u_tag="tag");