Workerman中SQL语句的使用 转

1. // 初始化db连接
2. $db = new Workerman\MySQL\Connection('host', 'port', 'user', 'password', 'db_name');
3. // 获取所有数据
4. $db->select('ID,Sex')->from('Persons')->where('sex= :sex AND ID = :id')->bindValues(array('sex'=>'M', 'id' => 1))->query();
5. //等价于
6. $db->select('ID,Sex')->from('Persons')->where("sex= 'M' AND ID = 1")->query();
7. //等价于
8. $db->query("SELECT ID,Sex FROM `Persons` WHERE sex='M' AND ID = 1");
9. // 获取一行数据
10. $db->select('ID,Sex')->from('Persons')->where('sex= :sex')->bindValues(array('sex'=>'M'))->row();
11. //等价于
12. $db->select('ID,Sex')->from('Persons')->where("sex= 'M' ")->row();
13. //等价于
14. $db->row("SELECT ID,Sex FROM `Persons` WHERE sex='M'");
15. // 获取一列数据
16. $db->select('ID')->from('Persons')->where('sex= :sex')->bindValues(array('sex'=>'M'))->column();
17. //等价于
18. $db->select('ID')->from('Persons')->where("sex= 'F' ")->column();
19. //等价于
20. $db->column("SELECT `ID` FROM `Persons` WHERE sex='M'");
21. // 获取单个值
22. $db->select('ID,Sex')->from('Persons')->where('sex= :sex')->bindValues(array('sex'=>'M'))->single();
23. //等价于
24. $db->select('ID,Sex')->from('Persons')->where("sex= 'F' ")->single();
25. //等价于
26. $db->single("SELECT ID,Sex FROM `Persons` WHERE sex='M'");
27. // 复杂查询
28. $db->select('*')->from('table1')->innerJoin('table2','table1.uid = table2.uid')->where('age > :age')->groupBy(array('aid'))->having('foo="foo"')->orderByASC/*orderByDESC*/(array('did'))
29. ->limit(10)->offset(20)->bindValues(array('age' => 13));
30. // 等价于
31. $db->query(SELECT * FROM `table1` INNER JOIN `table2` ON `table1`.`uid` = `table2`.`uid`
32. WHERE age > 13 GROUP BY aid HAVING foo="foo" ORDER BY did LIMIT 10 OFFSET 20“);
33. // 插入
34. $insert_id = $db->insert('Persons')->cols(array(
35. 'Firstname'=>'abc',
36. 'Lastname'=>'efg',
37. 'Sex'=>'M',
38. 'Age'=>13))->query();
39. 等价于
40. $insert_id = $db->query("INSERT INTO `Persons` ( `Firstname`,`Lastname`,`Sex`,`Age`)
41. VALUES ( 'abc', 'efg', 'M', 13)");
42. // 更新
43. $row_count = $db->update('Persons')->cols(array('sex'))->where('ID=1')
44. ->bindValue('sex', 'F')->query();
45. // 等价于
46. $row_count = $db->update('Persons')->cols(array('sex'=>'F'))->where('ID=1')->query();
47. // 等价于
48. $row_count = $db->query("UPDATE `Persons` SET `sex` = 'F' WHERE ID=1");
49. // 删除
50. $row_count = $db->delete('Persons')->where('ID=9')->query();
51. // 等价于
52. $row_count = $db->query("DELETE FROM `Persons` WHERE ID=9");
53. // 事务
54. $db->beginTrans();
55. ....
56. $db->commitTrans(); // or $db->rollBackTrans();

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