mysql 大数据量分页处理

select * from user where xx=1 limit 10,10

你需要有ORDER　BY 字段。 然后需要 （xx, orderCol) 的复合索引，再使用

select * from user a inner join (select id from user where xx=1 order by id

limit 10,10) b using(id)



select * from emp where deptno =  20 limit 900000,3;


ysql> alter table emp add index(deptno,empno);
uery OK, 0 rows affected (2 min 17.45 sec)
ecords: 0  Duplicates: 0  Warnings: 0

ysql> select * from emp where deptno =  20 limit 900000,3;
--------+--------+----------+-----+------------+---------+--------+--------+
 empno  | ename  | job      | mgr | hiredate   | sal     | comm   | deptno |
--------+--------+----------+-----+------------+---------+--------+--------+
 898210 | YfDEig | SALESMAN |   1 | 2013-10-13 | 2000.00 | 400.00 |     20 |
 898211 | ecaTrf | SALESMAN |   1 | 2013-10-13 | 2000.00 | 400.00 |     20 |
 898212 | ydVsaZ | SALESMAN |   1 | 2013-10-13 | 2000.00 | 400.00 |     20 |
--------+--------+----------+-----+------------+---------+--------+--------+
 rows in set (8.47 sec)

ysql> select * from emp a inner join
   -> (select empno from emp where deptno=20
   ->  order by empno limit 900000,3) b using(empno);
--------+--------+----------+-----+------------+---------+--------+--------+
 empno  | ename  | job      | mgr | hiredate   | sal     | comm   | deptno |
--------+--------+----------+-----+------------+---------+--------+--------+
 898210 | cOOBpV | SALESMAN |   1 | 2013-10-10 | 2000.00 | 400.00 |    334 |
 898210 | YfDEig | SALESMAN |   1 | 2013-10-13 | 2000.00 | 400.00 |     20 |
 898211 | BINPKg | SALESMAN |   1 | 2013-10-10 | 2000.00 | 400.00 |    279 |
 898211 | ecaTrf | SALESMAN |   1 | 2013-10-13 | 2000.00 | 400.00 |     20 |
 898212 | pUDigi | SALESMAN |   1 | 2013-10-10 | 2000.00 | 400.00 |    207 |
 898212 | ydVsaZ | SALESMAN |   1 | 2013-10-13 | 2000.00 | 400.00 |     20 |
--------+--------+----------+-----+------------+---------+--------+--------+
 rows in set (1.17 sec)

ysql> select version();
-----------+
 version() |
-----------+
 5.6.10    |
-----------+