How to get return value from stored procedure in ADO net?
To retrieve a RETURN value in ADO with a stored procedure, there must be at least one resultset. In order to work around this problem, when no resultsets are specified (in the ADO sample code) the stored procedure executes a SELECT NULL to return a null resultset to ADO thereby populating the RETURN value.
How to get stored procedure return value?
To see this yourself, execute any stored procedure from the object explorer, in SQL server management studio.
- Right Click and select Execute Stored Procedure.
- If the procedure, expects parameters, provide the values and click OK.
- Along with the result that you expect, the stored procedure also returns a Return Value = 0.
Why Stored Procedures are faster than query?
Stored procedures are precompiled and optimised, which means that the query engine can execute them more rapidly. By contrast, queries in code must be parsed, compiled, and optimised at runtime. This all costs time.
What is ExecuteScalar ExecuteNonQuery ExecuteReader?
ExecuteScalar() only returns the value from the first column of the first row of your query. ExecuteReader() returns an object that can iterate over the entire result set. ExecuteNonQuery() does not return data at all: only the number of rows affected by an insert, update, or delete.
What is recordset vb6?
A recordset is a data structure that consists of a group of database records, and can either come from a base table or as the result of a query to the table. The concept is common to a number of platforms, notably Microsoft’s Data Access Objects (DAO) and ActiveX Data Objects (ADO).
Why stored procedure is pre-compiled?
Stored Procedure is nothing but a precompiled SQL statement. This means that once we compile a query, it stores the result and the next time we don’t need to compile it again and again. It means it is prepared SQL code that you can save and reuse later multiple times.
What is the difference between adparamunknown and adparamreturnvalue 4?
adParamReturnValue 4 Indicates that the parameter represents a return value. adParamUnknown 0 Indicates that the parameter direction is unknown. ADO/WFC Equivalent
What is the difference between adparaminputoutput and adparamreturnvalue?
adParamInputOutput 3 Indicates that the parameter represents both an input and output parameter. adParamOutput 2 Indicates that the parameter represents an output parameter. adParamReturnValue 4 Indicates that the parameter represents a return value.
What is the difference between inparam and outparam in advarchar?
The first parameter, InParam, is an input parameter defined as adVarChar (20), and the second parameter, OutParam, is an output parameter defined as adVarChar (20). You can retrieve the return value/output parameter with the following code.
How do I append a parameter to a stored procedure?
When calling a stored procedure with parameters and explicitly appending a parameter to the Parameters collection with Append, the return value/output parameter should be appended to the Parameters collection. The return value must first be appended to the Parameters collection.