Commonly used database operation examples in Drupal7_PHP tutorial

1. Insert a single record

Copy code The code is as follows:

db_insert("table")->fields(array( 'field1' => 'value1', 'field2' => 'value2', 'fieldn' => $valuen))->execute();

2. Insert multiple records

Copy code The code is as follows:

$values[] = array('field1' => ; 'val1', 'field2' => 'val2', 'fieldn' => $valn);
$values[] = array('field1' => 'value1', 'field2' => ; 'value2', 'fieldn' => $valuen);
$query = db_insert('table')->fields(array('field1', 'field2', 'fieldn'));
foreach ($values ​​as $record) {
$query->values($record);
}
$query->execute();

3. Update a certain record

Copy code The code is as follows:

db_update('imports')
->condition('name', 'Chico' )
->fields(array('address' => 'Go West St.'))
->execute();
//Equivalent to:

UPDATE {imports} SET address = 'Go West St.' WHERE name = 'Chico';

4. Delete a record

Copy code The code is as follows:

db_delete('imports')
->condition('name' => ' Zeppo')
->execute();

5. Merge records

Copy code The code is as follows:

db_merge('people')
->key(array('job' => ; 'Speaker'))
->insertFields(array('age' => 31,'name' => 'Meredith'))
->updateFields(array('name' => ; 'Tiffany'))
->execute();
//If there is a record with job as Speaker, update the name to Tiffany, if it does not exist, insert a record with age 31 and name Meredith , job is the record of Speaker.

6. Automatically add one or self-increment to a certain field value in the database.

Copy code The code is as follows:

db_update('example_table')
->expression('count', 'count + 1')
->condition('field1', $some_value)
->expression('field2', 'field2 + :inc', array(':inc' => 2))
->execute();

7. Query a certain field in the database for another alias

Copy code The code is as follows:

$query = db_select('node', 'n');
$query-> ;addField('n', 'name', 'label');
$query->addField('n', 'name', 'value');

http://www.bkjia.com/PHPjc/736824.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/736824.htmlTechArticle1. Insert a single record and copy the code as follows: db_insert("table")-fields(array('field1' = 'value1', 'field2' = 'value2', 'fieldn' = $valuen))-execute(); 2. Insert multiple records and copy code...