1、insert into ... values
insert into tables (col1,col2) values (1,2),(2,3);
2、insert into ... select
insert into tables (col1,col2) select col3,col4 from table2;
3.insert into ... set
insert into tables set col1=xx,col2=xx;
4.replace into ...
replace into tables set col1=xx,col2=xx; //先删除后插入,如果有自增id,慎用!(唯一索引下才可以用)
5. insert into ... on duplicate key
insert into tables set col1=xx,col2=xx on duplicate key update col1=xxx,col2=xxx; //如果存在则更新,否则就是插入 (唯一索引下才可以用)
6.find_in_set(以逗号隔开,适用与in)
select col1,col2 from tables where FIND_IN_SET(col1,‘2,3,4‘)<1; //col1的值在‘2、3、4‘里面则返回所在索引(从1开始)
7. group_concat
select group_concat(col1,‘,‘,col2) as colx from tables where id={$id} group by id; //将col1,col2的值作为一个字段返回,按逗号分隔。
8.if、ifnull
update tables set status=if(status=‘release‘,‘modifie‘,status) where id={$id};
9.create database if not exists database1;
10.create table if not exists table1 like table2;