Hi, i have a MySQL query, and i want to write it in the CDbCriteria.
Here I’m fetching data from two different tables sorting by created time.
Please any one help me;
[sql]SELECT *
FROM (
(
SELECT id, title, content, created, photo_id, NULL AS image, pro_pic_id, NULL AS tags
FROM forum_post
)
UNION ALL (
SELECT id, title, content, created, NULL AS photo_id, image, NULL AS pro_pic_id, tags
FROM news
)
)results
ORDER BY created ASC
[/sql]
If its not a project limitation just use native sql and execute the query, i find it easier when writing complex queries.
$sql=’your query’; //The query, $sql can be anything – variable name
$connection=Yii::app()->db; //Instantiating a database connection from a singleton class! Dont worry its inbuilt!
$command=$connection->createCommand($sql); //creating the command
$result=$command->queryScalar(); The command gets executed and the result is stored. queryScalar() will return only one value.
NOTE:- The way you type and the way you need to execute will differ. There are several inbuilt methods such as queryScalar(), queryAll(), query(), etc. which can be used to obtain the exact result that is required. Passing parameters to the query is just as similar where you can merrily concatenate the parameter with a “.”
CDbCriteria class reference
Cheerz!