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Command Syntax

  • Článek

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)

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The OLE DB Driver for SQL Server recognizes command syntax specified by the DBGUID_SQL macro. For the OLE DB Driver for SQL Server, the specifier indicates that an amalgam of ODBC SQL, ISO, and Transact-SQL is valid syntax. For example, the following SQL statement uses an ODBC SQL escape sequence to specify the LCASE string function:

SELECT customerid={fn LCASE(CustomerID)} FROM Customers

LCASE returns a character string, converting all uppercase characters to their lowercase equivalents. The ISO string function LOWER does the same operation, so the following SQL statement is an ISO equivalent to the ODBC statement above:

SELECT customerid=LOWER(CustomerID) FROM Customers

The OLE DB Driver for SQL Server processes either form of the statement successfully when specified as text for a command.

Stored Procedures

When executing a SQL Server stored procedure using an OLE DB Driver for SQL Server command, use the ODBC CALL escape sequence in the command text. The OLE DB Driver for SQL Server then uses the remote procedure call mechanism of SQL Server to optimize command processing. For example, the following ODBC SQL statement is preferred command text over the Transact-SQL form:

  • ODBC SQL

    {call SalesByCategory('Produce', '1995')}

  • Transact-SQL

    EXECUTE SalesByCategory 'Produce', '1995'

See Also

Commands