时间:2021-07-01 10:21:17 帮助过:49人阅读
found_rows() : select row_count() : update delete insert 注:需要配合相应的操作一起使用,否则返回的值只是1和-1(都是不正确的值) 示例: drop database if exists `mytest`; create database `mytest`; use `mytest`; drop table if exists `MyTestTable
found_rows() : select
row_count() : update delete insert
注:需要配合相应的操作一起使用,否则返回的值只是1和-1(都是不正确的值)
示例:
drop database if exists `mytest`;
create database `mytest`;
use `mytest`;
drop table if exists `MyTestTable`;
create table `MyTestTable`(`ID` int ,`Name` varchar(10));
insert into `MyTestTable`(`ID`,`Name`)
select '1','role1' union all
select '2','role2' union all
select '3','role3';
select row_count(); -- 输出3(返回新添加的记录数),[注:如果使用insert into...values只返回1]
select * from `MyTestTable`;select found_rows(); -- 输出3(返回选择的行数)
update `MyTestTable` set `Name`='people';select row_count(); -- 输出3(返回修改的行数)
delete from `MyTestTable`;select row_count(); -- 输出3(返回删除的行数)
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