MSSQL的處理方法
update table1
set field_1 = field_2, field_2 = field_1
可是MySQL就不能這樣寫,不然一列會覆蓋另一列記錄
MySQL語句如下
update table1 a, table1 b
set a.field_1 = b.field_2, a.field_2 = b.field_1
where a.id = b.id
update table1
set field_1 = field_2, field_2 = field_1
可是MySQL就不能這樣寫,不然一列會覆蓋另一列記錄
update table1 a, table1 b
set a.field_1 = b.field_2, a.field_2 = b.field_1
where a.id = b.id