Contents
- 1 Can we call a SQL function from SQL stored procedure?
- 2 How do you call a scalar function from a stored procedure in SQL Server?
- 3 What is the difference between CTE and temp tables which one is better?
- 4 Can a function be called from a stored procedure?
- 5 When to use external procedures in Oracle 8.0?
Can we call a SQL function from SQL stored procedure?
A function can be called in a select statement as well as in a stored procedure. Since a function call would return a value we need to store the return value in a variable.
Can we call function from stored procedure?
We cannot call store procedure within a function. However, we can call a function within a store procedure. Purpose of Stored procedure: The stored procedure is used to execute business logic and hence may or may not return a value.
How do you call a scalar function from a stored procedure in SQL Server?
- declare @Param1 int.
- Declare @Param2 int.
- select @Param1 = object_id,@Param2 = colid from sys. columns where object_name(object_id)= ‘myTable’
- declare @selVal as integer.
- set @selVal = select dbogetCalcvalue(@Param1,@Param2)
- –do more stuff.
Can I use CTE in stored procedure?
According to the CTE documentation, Common Table Expression is a temporary result set or a table in which we can do CREATE, UPDATE, DELETE but only within that scope. That is, if we create the CTE in a Stored Procedure, we can’t use it in another Stored Procedure.
What is the difference between CTE and temp tables which one is better?
This biggest difference is that a CTE can only be used in the current query scope whereas a temporary table or table variable can exist for the entire duration of the session allowing you to perform many different DML operations against them. Below is the T-SQL for each of our test query types.
What is faster stored procedure or function?
As you can see, the scalar functions are slower than stored procedures. In average, the execution time of the scalar function was 57 seconds and the stored procedure 36 seconds….3. Are the scalar functions evil?
| Stored procedure execution time (s) | Function execution time (s) |
|---|---|
| 35 | 58 |
| Average: 35.8 | Average: 57.4 |
Can a function be called from a stored procedure?
Creating a Stored Procedure in SQL Server. A function can be called in a select statement as well as in a stored procedure. Since a function call would return a value we need to store the return value in a variable.
Can a C function be called from SQL?
These C functions are callable directly from PL/SQL, and from SQL through PL/SQL procedure calls. With 8.1, Oracle provides a special-purpose interface, the call specification, that lets you call external proceduresfrom other languages.
When to use external procedures in Oracle 8.0?
In Oracle 8.0, PL/SQL introduced external procedures, which allowed the capability of writing C functions as PL/SQL bodies. These C functions are callable directly from PL/SQL, and from SQL through PL/SQL procedure calls.
How to call an external procedure in Java?
An external procedure, also sometimes referred to as an external routine, is a procedure stored in a dynamic link library (DLL), or libunit in the case of a Java class method. You register the procedure with the base language, and then call it to perform special-purpose processing.