इसके लिए आप UNION ALL ऑपरेटर का इस्तेमाल कर सकते हैं। आइए पहले एक टेबल बनाएं -
mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Subject varchar(100) -> ); Query OK, 0 rows affected (0.64 sec)
इंसर्ट कमांड का उपयोग करके टेबल में कुछ रिकॉर्ड डालें -
mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable(Subject) values('Java'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.14 sec)
चयन कथन का उपयोग करके तालिका से सभी रिकॉर्ड प्रदर्शित करें -
mysql> select *from DemoTable;
आउटपुट
+----+---------+ | Id | Subject | +----+---------+ | 1 | MySQL | | 2 | MySQL | | 3 | MongoDB | | 4 | MongoDB | | 5 | MySQL | | 6 | Java | | 7 | MySQL | | 8 | MongoDB | +----+---------+ 8 rows in set (0.00 sec)
MySQL में LIMIT के साथ कई WHERE को लागू करने की क्वेरी निम्नलिखित है -
mysql> (select *from DemoTable where Subject='MySQL' limit 3) -> union all -> (select *from DemoTable where Subject='MongoDB' limit 5) -> ;
आउटपुट
+----+---------+ | Id | Subject | +----+---------+ | 1 | MySQL | | 2 | MySQL | | 5 | MySQL | | 3 | MongoDB | | 4 | MongoDB | | 8 | MongoDB | +----+---------+ 6 rows in set (0.00 sec)