Select the minimum value from the maximum values of two tables with a single MySQL
query?
For this, you can use UNION in MySQL. Let us first create a table −
mysql> create table DemoTable1
-> (
-> Value int
-> )
-> ;
Query OK, 0 rows affected (0.48 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1 values(60);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable1 values(78);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable1 values(57);
Query OK, 1 row affected (0.08 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1;
This will produce the following output
+-------+
| Value |
+-------+
| 60 |
| 78 |
| 57 |
+-------+
3 rows in set (0.00 sec)
Here is the query to create second −
mysql> create table DemoTable2
-> (
-> Value int
-> );
Query OK, 0 rows affected (0.48 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable2 values(90) ;
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable2 values(67) ;
Query OK, 1 row affected (0.14 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable2;
This will produce the following output
+-------+
| Value |
+-------+
| 90 |
| 67 |
+-------+
2 rows in set (0.00 sec)
Here is the query to select the minimum value from the maximum value of two tables −
mysql> select min(tbl.Value) as Value
-> from
-> (
-> select max(Value) as Value from DemoTable1608
-> union
-> select max(Value) as Value from DemoTable1609
-> ) as tbl;
This will produce the following output
+-------+
| Value |
+-------+
| 78 |
+-------+
1 row in set (0.04 sec)
Published on 17-Dec-2019 10:28:03
