简单SQL语句举例
select t2_je from t2; 最简单的查询select * into tab2_bak from tab2; 备份一个表select * from t2 where t2_lsbh in('111','1111') ; 带条件的查询select * from t2 where t2_lsbh ='111' or t2_lsbh='1111' ; 等同于上个查询比较符 like in not 条件逻辑关系 and or select * from t2 where t2_lsbh like'1111%'; like用法 select * from t3; Update t3 set t3_dz