Mysql limit usage

When a query statement is used, the first few or a few rows of data are often returned. What should I do at this time? Don't worry, MySQLThis feature has been provided for us.

SELECT * FROM table LIMIT [offset,] rows | rows OFFSET

The LIMIT clause can be used to force the SELECT statement to return the specified number of records. LIMIT accepts one or two numeric parameters. The parameter must be an integer constant. If two parameters are specified, the first parameter specifies the offset of the first returned record row, and the second parameter specifies the maximum number of returned record rows. The OFFSET of the first record row is 0 rather than 1. To be compatible with PostgreSQL, MySQL also supports Syntax: LIMIT # OFFSET #.

Mysql> SELECT * FROM table LIMIT 5, 10; // retrieves records FROM 6 to 15 rows.

// To retrieve all record rows from an offset to the end of the record set, you can specify the second parameter-1:
Mysql> SELECT * FROM table LIMIT 95,-1; // retrieves 96-last records.

// If only one parameter is specified, it indicates the maximum number of record rows returned:
Mysql> SELECT * FROM table LIMIT 5; // retrieve the first five record rows

// In other words, LIMIT n is equivalent to LIMIT 0, n.

 

 

Instance:

Mysql> use sppeivan;
Database changed
Mysql> select * from employee;// Return all results
+ ------------ + -------- + ------------- +
| Username | password | gender | cellphone |
+ ------------ + -------- + ------------- +
| Ewrew | erewr | man | 13618889076 |
| Ewrwerw32r | 324324 | man | 13618889076 |
| Grrrrr | r44343 | woman | 1, 13618889076 |
| Pansong | erewrwe | man | 13618889076 |
| Ret43t43t | 43t43 | man | 13618889076 |
| Ret44t4 | r4tgr | woman | 13618889076 |
| Tttt | 4et | woman | 13618889076 |
| Wr34r | retre | man | 1, 13618889076 |
| XXX | safe | man | 13618889076 |
| Hhh | ewrwer | man | 13618889076 |
| Hg| 6574326543 | man | 13618889076 |
| PS | ewrwe | man | 13618889076 |
| Zhu | werew | man | 13618889076 |
+ ------------ + -------- + ------------- +
13 rows in SET (0.01 Sec)

Mysql> select * from employee limit 3 7;
Error 1064 (42000): You have an error in your SQL syntax
Corresponds to your MySQL Server version for the right s
Line 1
Mysql> select * from employee limit 3, 7;// Return 4-11 rows
+ ----------- + ---------- + -------- + ------------- +
| Username | password | gender | cellphone |
+ ----------- + ---------- + -------- + ------------- +
| Pansong | erewrwe | man | 13618889076 |
| Ret43t43t | 43t43 | man | 13618889076 |
| Ret44t4 | r4tgr | woman | 13618889076 |
| Tttt | 4et | woman | 13618889076 |
| Wr34r | retre | MAN | 1, 13618889076 |
| Xxx | safe | MAN | 13618889076 |
| Hhh | ewrwer | MAN | 13618889076 |
+ ----------- + ---------- + -------- + ------------- +
7 rows in set (0.00 sec)

Mysql> select * from employee limit 3,-1;// Error syntax
ERROR 1064 (42000): You have an error in your SQL syntax
Corresponds to your MySQL server version for the right s
T line 1

Mysql> select * from employee limit 3, 1;// Return 4th rows
+ ---------- + -------- + ------------- +
| Username | password | gender | cellphone |
+ ---------- + -------- + ------------- +
| Pansong | erewrwe | MAN | 13618889076 |
+ ---------- + -------- + ------------- +
1 row in set (0.00 sec)

Mysql> select * from employee limit 3;// Return the first three rows

+ ------------ + ---------- + -------- + ------------- +
| Username | password | gender | cellphone |
+ ------------ + ---------- + -------- + ------------- +
| Ewrew | erewr | MAN | 13618889076 |
| Ewrwerw32r | 324324 | MAN | 13618889076 |
| Grrrrr | r44343 | WOMAN | 1, 13618889076 |
+ ------------ + ---------- + -------- + ------------- +
3 rows in set (0.00 sec)

Mysql> select * from employee limit 10;// Return the first 10 rows

+ ------------ + ---------- + -------- + ------------- +
| Username | password | gender | cellphone |
+ ------------ + ---------- + -------- + ------------- +
| Ewrew | erewr | man | 13618889076 |
| Ewrwerw32r | 324324 | man | 13618889076 |
| Grrrrr | r44343 | woman | 1, 13618889076 |
| Pansong | erewrwe | man | 13618889076 |
| Ret43t43t | 43t43 | man | 13618889076 |
| Ret44t4 | r4tgr | woman | 13618889076 |
| Tttt | 4et | woman | 13618889076 |
| Wr34r | retre | man | 1, 13618889076 |
| XXX | safe | man | 13811588469 |
| Hhh | ewrwer | man | 13618889076 |
+ ------------ + ---------- + -------- + ------------- +
10 rows in SET (0.00 Sec)

Mysql> select * from employee limit 9, 1;// Return 10th rows

+ ---------- + -------- + ------------- +
| Username | password | gender | cellphone |
+ ---------- + -------- + ------------- +
| Hhh | ewrwer | man | 13816668468 |
+ ---------- + -------- + ------------- +
1 row in SET (0.00 Sec)