CODEWITHSUNDEEP
mysqlselectjoin
Someone
Someone

Reputation: 736

Is there any way on MySQL to update and select the updated rows in a single statement t?

Can I join SELECT and UPDATE statement? If yes, how can I do that?

I have table which name is news.

I show news on my website. If someone read news I add 1 to hit. I do that with 2 queries:

mysql_query("SELECT * FROM news WHERE id=2 LIMIT 1");
mysql_query("UPDATE news SET hit=hit+1 WHERE id=2");

But I want to join them.

id | title     | content           |hit
---+-----------+-------------------+---
1  | sdfsdfdsf | dfsdffdsfds836173 |5
2  | sfsdfds   | sdfsdsdfdsfdsfsd4 |9
3  | ssdfsdfds | sdfdsfs           |3

Update: the OP wants to update and select the updated rows within one sql statement.

Upvotes: 5

Views: 664

Answers (3)

Jürgen Steinblock
Jürgen Steinblock

Reputation: 31723

Write a stored procedure:

delimiter //;
DROP PROCEDURE IF EXISTS ReadNews//;
CREATE PROCEDURE ReadNews(IN newsId INT)
BEGIN
    SELECT * FROM news WHERE id=newsId LIMIT 1;
    UPDATE news SET hit=hit+1 WHERE id=newsId;
END

Usage:

CALL ReadNews(2)

Update

By the way, most mysql clients support multiple actions in a single statement. A common use for this is (Pseude C# Code)

var result = DB.Execute("INSERT INTO table (id, name) VALUES (1, 'test'); SELECT LAST_INSERT_ID()");

which will perform an Insert and Return the id of the newly created record.

You possibly could do

var result = mysql_query("UPDATE news SET hit=hit+1 WHERE id=2; SELECT * FROM news WHERE id = 2");

Upvotes: 1

Ganesh Bora
Ganesh Bora

Reputation: 1153

best way is to write trigger which will increment hit count on select news When SELECT * FROM news WHERE id=2 LIMIT 1 Fire trigger UPDATE news SET hit=hit+1 WHERE id=2

Upvotes: 0

Rupesh Pawar
Rupesh Pawar

Reputation: 1917

Any numeric field will do it by this (tinyint, int, float, etc).

mysql_query("UPDATE news SET hit=hit+1 WHERE id=2 ");

Hope this will help.

Upvotes: 0

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