-------------- drop table if exists trow -------------- Query OK, 0 rows affected, 1 warning -------------- create table trow(col1 int, col2 int) engine=infinidb -------------- Query OK, 0 rows affected -------------- insert into trow values(1,2),(3,4) -------------- Query OK, 2 rows affected Records: 2 Duplicates: 0 Warnings: 0 -------------- select * from trow -------------- col1 col2 1 2 3 4 2 rows in set -------------- update trow set col1 = 10 -------------- Query OK, 2 rows affected Rows matched: 0 Changed: 0 Warnings: 0 -------------- select * from trow -------------- col1 col2 10 2 10 4 2 rows in set -------------- update trow set col1 = 11 where col2=20 -------------- Query OK, 0 rows affected Rows matched: 0 Changed: 0 Warnings: 0 -------------- update trow set col1 = 11 -------------- Query OK, 2 rows affected Rows matched: 0 Changed: 0 Warnings: 0 -------------- update trow set col1 = 12 where col2=20 -------------- Query OK, 0 rows affected Rows matched: 0 Changed: 0 Warnings: 0 -------------- select * from trow -------------- col1 col2 11 2 11 4 2 rows in set -------------- delete from trow -------------- Query OK, 2 rows affected -------------- delete from trow where col2=20 -------------- Query OK, 0 rows affected -------------- select * from trow -------------- Empty set -------------- drop table trow -------------- Query OK, 0 rows affected Bye