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How to find missing value between two MySQL Tables?
To find missing value between two MySQL tables, use NOT IN. Let us first create a table −
mysql> create table DemoTable1(Value int); Query OK, 0 rows affected (0.56 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1 values(1); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1 values(2); Query OK, 1 row affected (0.28 sec) mysql> insert into DemoTable1 values(5); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable1 values(6); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1 values(8); Query OK, 1 row affected (0.16 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable1;
This will produce the following output −
+-------+ | Value | +-------+ | 1 | | 2 | | 5 | | 6 | | 8 | +-------+ 5 rows in set (0.00 sec)
Following is the query to create second table −
mysql> create table DemoTable2(Value int); Query OK, 0 rows affected (1.19 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable2 values(1); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable2 values(2); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable2 values(3); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable2 values(4); Query OK, 1 row affected (0.12 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable2;
This will produce the following output −
+-------+ | Value | +-------+ | 1 | | 2 | | 3 | | 4 | +-------+ 4 rows in set (0.00 sec)
Following is the query to find missing value between two MySQL Tables −
mysql> select Value from DemoTable1 where Value not in(select Value from DemoTable2);
This will produce the following output −
+-------+ | Value | +-------+ | 5 | | 6 | | 8 | +-------+ 3 rows in set (0.07 sec)
Updated on: 26-Aug-2019
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