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Why does Pdo convert all of our int type to string type ??? What parameters do you want to set ??
What are the considerations for this design ??? A little pitfall
Reply to discussion (solution)
You need to set the parameter type when passing
SQL string to Int type, SQL string int
In general, SQL statements can be implicitly converted without strong conversion. It is really necessary to replace it with int type.
Convert (int, @ str)
Today we are talking about another situation,First
SQL CONVERT () string int-type Date character type
Convert to date notation
Convert (data_type (length), Data_to_be_converted,style)
Instance
Select CONVERT (varchar), GETDATE (), () now
Convert to integral type
convert (int, column)
If I
As early as a few years before SQL injection went viral, string conversion into integers has been listed as a required operation for every web program. The web program forcibly converts the id and integer equivalent values from get or post into
Original: http://www.2cto.com/database/201310/250880.htmlSQL cast and CONVERT usage detailed Summary: The following applies only to Mysqlselect {fn CONCAT (CONVERT (User_id,char), user_name)} as Str from T_SYS_ User following this applies only to
As early as a few years before SQL injection went viral, string conversion into integers has been listed as a required operation for every web program. The web program forcibly converts the id and integer equivalent values from get or post into
Background and overviewAs early as a few years before SQL injection went viral, String Conversion into integers has been listed as a required operation for every web program. The web program forcibly converts the id and integer equivalent values
Background, overviewAs early as the SQL injection rampage, the string converted to integers has been listed as a prerequisite for every Web application. The Web program converts the ID, integer equivalent of Get or post to an integer, filters out
SyntaxUse CAST:
CAST (expression AS data_type)
Use CONVERT:
CONVERT (data_type [(length)], expression [, style])
ParametersExpression
Is any valid Microsoft SQL Server "expression. For more information, see expressions.
Data_type
The data types
GrammarUse CAST:
CAST (expression as data_type)
Use CONVERT:
CONVERT (data_type[(length)], expression [, style])
ParametersExpression
Is any valid Microsoft SQL Server expression. For more information, see expressions.
Data_type
The data
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