Documentation Home
MySQL 8.3 Reference Manual
Related Documentation Download this Manual
PDF (US Ltr) - 40.7Mb
PDF (A4) - 40.8Mb
Man Pages (TGZ) - 293.3Kb
Man Pages (Zip) - 408.4Kb
Info (Gzip) - 4.0Mb
Info (Zip) - 4.0Mb
Excerpts from this Manual

15.2.18 UNION Clause

query_expression_body UNION [ALL | DISTINCT] query_block
    [UNION [ALL | DISTINCT] query_expression_body]
    [...]

query_expression_body:
    See Section 15.2.14, “Set Operations with UNION, INTERSECT, and EXCEPT”

UNION combines the result from multiple query blocks into a single result set. This example uses SELECT statements:

mysql> SELECT 1, 2;
+---+---+
| 1 | 2 |
+---+---+
| 1 | 2 |
+---+---+
mysql> SELECT 'a', 'b';
+---+---+
| a | b |
+---+---+
| a | b |
+---+---+
mysql> SELECT 1, 2 UNION SELECT 'a', 'b';
+---+---+
| 1 | 2 |
+---+---+
| 1 | 2 |
| a | b |
+---+---+