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
8. $command = (new \yii\db\Query())
9. ->select([‘id‘, ‘email‘])
10. ->from(‘user‘)
11. ->where([‘last_name‘ => ‘Smith‘])
12. ->limit(10)
13. ->createCommand();
15. // show the SQL statement
16. echo $command->sql;
17. // show the parameters to be bound
18. print_r($command->params);
21. // returns all rows of the query result
22. $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