An explanation of mysql strict mode Strict Mode
1. How to turn on and off Strict Mode
Find my.cnf in the mysql installation directory (for Windows systems, it is my.ini) File
Adding STRICT_TRANS_TABLES to sql_mode means turning on strict mode. If not added, it means non-strict mode. After modification, restart mysql. But
For example, this means that strict mode is turned on:
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
2. Strict Mode Function Description
Does not support inserting null values into not null fields
No Supports inserting "value" into self-increasing fields
Does not support text fields with default values
3. Example:
Create a data table to facilitate testing
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1.Not null field inserts null value test
Insert a record, the value of name is null
Execute in non-strict mode
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The execution is successful, and the value of name is automatically converted to "
Execute in strict mode##
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Execution failed, prompting that the field name cannot be a null value
2. Insert "value test for self-increasing fields
Insert "value for id field
Execute in non-strict mode##
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Executed in strict mode
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##3. Text field default value test
#Create a data table mytable, in which text sets the default value default=”
Executed in non-strict mode##
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Execution in strict mode
##
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