• Workerman MySQL组件Connection用法总结


    一、初始化连接

    $db = new WorkermanMySQLConnection('host', 'port', 'user', 'password', 'db_name');

    二、获取所有数据

    $db->select('ID,Sex')->from('Persons')->where('sex= :sex AND ID = :id')->bindValues(array('sex'=>'M', 'id' => 1))->query();
    //等价于
    $db->select('ID,Sex')->from('Persons')->where("sex= 'M' AND ID = 1")->query();
    //等价于
    $db->query("SELECT ID,Sex FROM `Persons` WHERE sex='M' AND ID = 1");

    三、获取一行数据

    $db->select('ID,Sex')->from('Persons')->where('sex= :sex')->bindValues(array('sex'=>'M'))->row();
    //等价于
    $db->select('ID,Sex')->from('Persons')->where("sex= 'M' ")->row();
    //等价于
    $db->row("SELECT ID,Sex FROM `Persons` WHERE sex='M'");

    四、获取一列数据

    $db->select('ID')->from('Persons')->where('sex= :sex')->bindValues(array('sex'=>'M'))->column();
    //等价于
    $db->select('ID')->from('Persons')->where("sex= 'F' ")->column();
    //等价于
    $db->column("SELECT `ID` FROM `Persons` WHERE sex='M'");

    五、获取单个值

    $db->select('ID')->from('Persons')->where('sex= :sex')->bindValues(array('sex'=>'M'))->single();
    //等价于
    $db->select('ID')->from('Persons')->where("sex= 'F' ")->single();
    //等价于
    $db->single("SELECT ID FROM `Persons` WHERE sex='M'");

    六、复杂查询

    $db->select('*')->from('table1')->innerJoin('table2','table1.uid = table2.uid')->where('age > :age')->groupBy(array('aid'))->having('foo="foo"')->orderByASC/*orderByDESC*/(array('did'))
    ->limit(10)->offset(20)->bindValues(array('age' => 13));
    // 等价于
    $db->query('SELECT * FROM `table1` INNER JOIN `table2` ON `table1`.`uid` = `table2`.`uid`
    WHERE age > 13 GROUP BY aid HAVING foo="foo" ORDER BY did LIMIT 10 OFFSET 20');

    七、插入数据

    $insert_id = $db->insert('Persons')->cols(array(
        'Firstname'=>'abc',
        'Lastname'=>'efg',
        'Sex'=>'M',
        'Age'=>13))->query();
    等价于
    $insert_id = $db->query("INSERT INTO `Persons` ( `Firstname`,`Lastname`,`Sex`,`Age`)
    VALUES ( 'abc', 'efg', 'M', 13)");

    八、更新数据

    $row_count = $db->update('Persons')->cols(array('sex'))->where('ID=1')
    ->bindValue('sex', 'F')->query();
    // 等价于
    $row_count = $db->update('Persons')->cols(array('sex'=>'F'))->where('ID=1')->query();
    // 等价于
    $row_count = $db->query("UPDATE `Persons` SET `sex` = 'F' WHERE ID=1");

    九、删除数据

    $row_count = $db->delete('Persons')->where('ID=9')->query();
    // 等价于
    $row_count = $db->query("DELETE FROM `Persons` WHERE ID=9");

    十、事务处理

    $db->beginTrans();
    ....
    $db->commitTrans(); // or $db->rollBackTrans();
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  • 原文地址:https://www.cnblogs.com/phperlinxinlan/p/11165250.html
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