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Display the warning message when a FLOAT value is inserted into DECIMAL in MySQL?
You can create a temporary table with data type DECIMAL to get a warning when a float value is inserted into an int column. Display the same warning using SHOW WARNINGS.
Let us create a table to understand. The query is as follows to create a table.
mysql> create temporary table WarningDemo -> ( -> Value DECIMAL -> ); Query OK, 0 rows affected (0.13 sec)
Insert some records in the table using insert command. The query is as follows −
mysql> insert into WarningDemo values(9.80); Query OK, 1 row affected, 1 warning (0.03 sec)
Here we are getting a warning. Let us check the warning using SHOW command. The syntax is as follows −
SHOW WARNINGS;
The query is as follows −
mysql> show warnings;
Output
+-------+------+--------------------------------------------+ | Level | Code | Message | +-------+------+--------------------------------------------+ | Note | 1265 | Data truncated for column 'Value' at row 1 | +-------+------+--------------------------------------------+ 1 row in set (0.00 sec)
Display all records from the table using a select statement. The query is as follows −
mysql> select *from WarningDemo;
Output
+-------+ | Value | +-------+ | 10 | +-------+ 1 row in set (0.00 sec)
Updated on: 30-Jul-2019
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