1. 程式人生 > >yii2 查詢構建器

yii2 查詢構建器

tle another inner param div order by views comm asc

Query Builder

[php] view plain copy
  1. $rows = (new \yii\db\Query())
  2. ->select([‘dyn_id‘, ‘dyn_name‘])
  3. ->from(‘zs_dynasty‘)
  4. ->where([‘between‘,‘dyn_id‘, 1,30])
  5. ->limit(10)
  6. ->all();
  7. print_r($rows);

[php] view plain copy
  1. use yii\db\Query;
  2. $query = (new Query())
  3. ->from(‘user‘)
  4. ->orderBy(‘id‘);

SELECT
[php] view plain copy
  1. $query->select(‘*‘)->
  2. select(‘dyn_id as id, dynasty.dyn_name‘)->
  3. $query->select([‘dyn_id as id‘, "CONCAT(dyn_name,‘a‘)"])->
  4. $query->select(‘user_id‘)->distinct()->



FORM [php] view plain copy
  1. $query->from(‘user‘);
  2. $query->from([‘public.user u‘, ‘public.post p‘]);
  3. $query->from(‘public.user u, public.post p‘);
  4. $query->from([‘u‘ => ‘public.user‘, ‘p‘ => ‘public.post‘]);
  5. ----------
  6. $subQuery = (new Query())->select(‘id‘)->from(‘user‘)->where(‘status=1‘);
  7. // SELECT * FROM (SELECT `id` FROM `user` WHERE status=1) u
  8. $query->from([‘u‘ => $subQuery]);

WHERE [php] view plain copy
  1. where(‘status=1‘)->
  2. where(‘status=:status‘, [‘:status‘ => $status])->
  3. where([
  4. ‘status‘ => 10,
  5. ‘type‘ => null,
  6. ‘id‘ => [4, 8, 15],
  7. ])->
  8. -------
  9. $userQuery = (new Query())->select(‘id‘)->from(‘user‘);
  10. // ...WHERE `id` IN (SELECT `id` FROM `user`)
  11. $query->...->where([‘id‘ => $userQuery])->...
  12. --------
  13. [‘and‘, ‘id=1‘, ‘id=2‘] //id=1 AND id=2
  14. [‘and‘, ‘type=1‘, [‘or‘, ‘id=1‘, ‘id=2‘]] //type=1 AND (id=1 OR id=2)
  15. [‘between‘, ‘id‘, 1, 10] //id BETWEEN 1 AND 10
  16. [‘not between‘, ‘id‘, 1, 10] //not id BETWEEN 1 AND 10
  17. [‘in‘, ‘id‘, [1, 2, 3]] //id IN (1, 2, 3)
  18. [‘not in‘, ‘id‘, [1, 2, 3]] //not id IN (1, 2, 3)
  19. [‘like‘, ‘name‘, ‘tester‘] //name LIKE ‘%tester%‘
  20. [‘like‘, ‘name‘, [‘test‘, ‘sample‘]] //name LIKE ‘%test%‘ AND name LIKE ‘%sample%‘
  21. [‘not like‘, ‘name‘, [‘or‘, ‘test‘, ‘sample‘]] //not name LIKE ‘%test%‘ OR not name LIKE ‘%sample%‘
  22. [‘exists‘,‘id‘, $userQuery] //EXISTS (sub-query) | not exists
  23. [‘>‘, ‘age‘, 10] //age>10

ADD WHERE [php] view plain copy
  1. $status = 10;
  2. $search = ‘yii‘;
  3. $query->where([‘status‘ => $status]);
  4. if (!empty($search)) {
  5. $query->andWhere([‘like‘, ‘title‘, $search]);
  6. }
  7. //WHERE (`status` = 10) AND (`title` LIKE ‘%yii%‘)
  8. //andWhere() or orWhere()


FILTER WHERE
[php] view plain copy
  1. $query->filterWhere([
  2. ‘username‘ => $username,
  3. ‘email‘ => $email,
  4. ]);
  5. //如果email為空,則 WHERE username=:username
ORDER BY [php] view plain copy
  1. $query->orderBy([
  2. ‘id‘ => SORT_ASC,
  3. ‘name‘ => SORT_DESC,
  4. ]);
  5. //orderBy , addOrderBy

GROUP BY
[php] view plain copy
  1. $query->groupBy(‘id, status‘);
  2. $query->addGroupBy([‘created_at‘, ‘updated_at‘]);

HAVING
[php] view plain copy
  1. $query->having([‘status‘ => $status]);
  2. //having,andHaving,orHaving

LIMIT OR OFFSET [php] view plain copy
  1. $query->limit(10);
  2. $query->offset(10);

JOIN
  • innerJoin()
  • leftJoin()
  • rightJoin()
[php] view plain copy
  1. $query->select([‘user.name AS author‘, ‘post.title as title‘])
  2. ->from(‘user‘)
  3. ->leftJoin(‘post‘, ‘post.user_id = user.id‘);
  4. $query->join(‘FULL OUTER JOIN‘, ‘post‘, ‘post.user_id = user.id‘);
  5. $query->leftJoin([‘u‘ => $subQuery], ‘u.id=author_id‘);


UNION
[php] view plain copy
  1. $query = new Query();
  2. $query->select("id, category_id as type, name")->from(‘post‘)->limit(10);
  3. $anotherQuery = new Query();
  4. $anotherQuery->select(‘id, type, name‘)->from(‘user‘)->limit(10);
  5. $query->union($anotherQuery);

QUERY METHODS
  • all() //所有行列
  • one() //第一行
  • column() //第一列
  • scalar() //第一行第一列
  • exists() //是否有結果存在
  • count() //記錄數量
  • sum($q), average($q), max($q), min($q) //$q 為字段或表達式
[php] view plain copy
  1. $count = (new \yii\db\Query())
  2. ->from(‘user‘)
  3. ->where([‘last_name‘ => ‘Smith‘])
  4. ->count();
  5. //SELECT COUNT(*) FROM `user` WHERE `last_name`=:last_name
  6. $command = (new \yii\db\Query())
  7. ->select([‘id‘, ‘email‘])
  8. ->from(‘user‘)
  9. ->where([‘last_name‘ => ‘Smith‘])
  10. ->limit(10)
  11. ->createCommand();
  12. // show the SQL statement
  13. echo $command->sql;
  14. // show the parameters to be bound
  15. print_r($command->params);
  16. // returns all rows of the query result
  17. $rows = $command->queryAll();
QUERY RESULTS [php] view plain copy
  1. use yii\db\Query;
  2. $query = (new Query())
  3. ->from(‘user‘)
  4. ->indexBy(‘username‘);
  5. foreach ($query->batch() as $users) {
  6. // $users is indexed by the "username" column
  7. }
  8. foreach ($query->each() as $username => $user) {
  9. }


INDEXING [php] view plain copy
  1. use yii\db\Query;
  2. $query = (new Query())
  3. ->from(‘user‘)
  4. ->orderBy(‘id‘);
  5. foreach ($query->batch() as $users) {
  6. // batch( $batchSize = 100, $db = null )
  7. // 一個批次取100行
  8. }
  9. foreach ($query->each() as $user) {
  10. // 一行一行取
  11. }

yii2 查詢構建器