These include xml, bigint, and sql_variant. The following illustration shows all explicit and implicit data type conversions that are allowed for SQL Server system-supplied data types. Use CONVERT instead of CAST to take advantage of the style functionality in CONVERT.
SQL SERVER CONVERT STRING TO DOUBLE CODE
Use CAST instead of CONVERT if you want Transact-SQL program code to comply with ISO. For example, the following CAST function converts the numeric value of $157.27 into a character string of '157.27': CAST ( $157.27 AS VARCHAR(10) ) The CAST and CONVERT functions convert a value (a local variable, a column, or another expression) from one data type to another. SYSDATETIME() implicitly converts to date style 21.Įxplicit conversions use the CAST or CONVERT functions. GETDATE() implicitly converts to date style 0. For example, when a smallint is compared to an int, the smallint is implicitly converted to int before the comparison proceeds. SQL Server automatically converts the data from one data type to another. Implicit conversions are not visible to the user.
Implicit and explicit conversionĭata types can be converted either implicitly or explicitly. When you convert between an application variable and a SQL Server result set column, return code, parameter, or parameter marker, the supported data type conversions are defined by the database API. When data from a Transact-SQL result column, return code, or output parameter is moved into a program variable, the data must be converted from the SQL Server system data type to the data type of the variable.When data from one object is moved to, compared with, or combined with data from another object, the data may have to be converted from the data type of one object to the data type of the other.I'm not sure why the date parameters in the sp are set as varchars, I can only wonder if it's to be compatible with the mysql DB.Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL Endpoint in Microsoft Fabric Warehouse in Microsoft Fabricĭata types can be converted in the following scenarios: When I run the stored procedure in visual studio I have tried all the different ways of entering the values for the dates I can think of but I still get the error. Set = float out' -, varchar(12)' -, datetime, datetime' Įxecute sp_executesql out -, -, I run exec('call flexi.GetHoursWorkedBetweenDates(''62843'','''','''') ') at fleximysql on the SQL server iot works fine but when I set up a new SSRS report calling the stored procedure I get the error:įailed to convert parameter value from a string to a double Set = 'select = total_time_decimal from openquery(fleximysql, ''' + + ''')' exec('select ? = max(time_worked) from flexi.work_time', output) at fleximysql exec('select ? = count(*) from flexi.work_time', output) at fleximysql select = total_time_decimal from openquery(fleximysql, 'call flexi.GetHoursWorkedBetweenDates(''62843'','''','''') ') the one below works for literal values only select = total_time_decimal from openquery(fleximysql, 'call flexi.GetHoursWorkedBetweenDates(''62843'',''+ +'','''') ') select = total_time_decimal from openquery(fleximysql, ) ( int, datetime, datetime ) RETURNS floatĪLTER procedure. I have a stored procedure on a SQL 2005 DB that retrieves data from a mysql DB on another server (none of this was set up by myself)
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