MySQLMySQL Unions
Syntax
- SELECT column_name(s) FROM table1 UNION SELECT column_name(s) FROM table2;
- SELECT column_name(s) FROM table1 UNION ALL SELECT column_name(s) FROM table2;
- SELECT column_name(s) FROM table1 WHERE col_name="XYZ" UNION ALL SELECT column_name(s) FROM table2 WHERE col_name="XYZ";
Remarks
UNION DISTINCT is the same as UNION; it is slower than UNION ALL because of a de-duplicating pass. A good practice is to always spell out DISTINCT or ALL, thereby signaling that you thought about which to do.
MySQL Unions Related Examples
This modified text is an extract of the original Stack Overflow Documentation created by following contributors and released under CC BY-SA 3.0
This website is not affiliated with Stack Overflow
Email: tutorialpedia@outlook.com
Related Projects