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Using ! operator in MySQL
For same results, do not use ! operator. The NOT keyword is already provided by MySQL. Let us first create a table −
mysql> create table DemoTable1560 -> ( -> Value1 int -> ); Query OK, 0 rows affected (0.50 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1560 values(0); Query OK, 1 row affected (0.16 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1560;
This will produce the following output −
+--------+ | Value1 | +--------+ | 0 | +--------+ 1 row in set (0.00 sec)
Here is the query to use NOT keyword −
mysql> select NOT (NOT Value1), NOT NOT Value1, NOT NOT Value1 from DemoTable1560;
This will produce the following output −
+------------------+----------------+----------------+ | NOT (NOT Value1) | NOT NOT Value1 | NOT NOT Value1 | +------------------+----------------+----------------+ | 0 | 0 | 0 | +------------------+----------------+----------------+ 1 row in set (0.00 sec)
Updated on: 12-Dec-2019
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