MySQL 返回影响行数的测试示例

(在测试MySQL 5.1.36上测试)

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)