MySQL选择*其中NUM_ROW> X

Question

I have table clients

+------+------+------------+
|  id  | name | company_id |
+------+------+------------+
|  1   | Test |     1      |
+------+------+------------+

When I want to select (for example) first 30 clients it all all right.

SELECT
  id,
  name
FROM client
WHERE company_id = 1
LIMIT  30;

But I don't now to select second 30, third 30. My way to solve:

SET @row_num=0
SELECT
  @row_num:=@row_num+1 AS row_number,
  id,
  name
FROM client
WHERE company_id = 1
AND row_number = 20;
LIMIT  30;

There is errror: Unknown column 'row_number' in 'where clause'. How to solve it?

Answer 1

Look at the LIMIT OFFSET syntax

What if we want to select records 16 - 25 (inclusive)?

Mysql also provides a way to handle this: by using OFFSET.

The SQL query below says "return only 10 records, start on record 16 (OFFSET 15)":
$sql = "SELECT * FROM Orders LIMIT 10 OFFSET 15";