What is the difference between macros and procedures?

What is the difference between macros and procedures?

The main difference between Macro and Procedure is that a macro is used for a small number of instructions; mostly, less than ten instructions, while the procedure is used for a large number of instructions; mostly, higher than ten instructions.

What is a macro Teradata?

Macro is a set of SQL statements which are stored and executed by calling the Macro name. The definition of Macros is stored in Data Dictionary. Macro statements are executed as a single transaction. If one of the SQL statements in Macro fails, then all the statements are rolled back. Macros can accept parameters.

What is the difference between query and stored procedure?

What is the difference between a query and stored procedure? query and stored procedure do the same thing but the difference is that a query should be compiled everytime the query is executed,while the stored procedure is in compiled form when executed first time.

What is Teradata stored procedure?

Definition. A stored procedure, a database object executed on the Teradata Database, is a combination of SQL statements and control and condition handling statements that provide an interface to the Teradata Database. The term stored procedure refers to a stored procedure you write with SQL statements.

What is the difference between a subroutine procedure and a macro?

The main difference is in the way they are used. Only subroutines can be used when you need to pass arguments, get a return value, or activate the independent execution of logic. Only macros can be used when defining run-time interface parameters.

What is macro and macro processing operation?

A macro processor is a program that copies a stream of text from one place to another, making a systematic set of replacements as it does so. Macro processors are often embedded in other programs, such as assemblers and compilers. Sometimes they are standalone programs that can be used to process any kind of text.

Why we use macros in Teradata?

Macros are used to store sql statements that are frequently used, this eliminates the need for users to retype the SQL when needed. Macro may have numerous SELECT statements and DML’s but it can have only one DDL statement and that too must be the single statement.

What are SQL macros?

What is a SQL Macro. It’s a new, simpler way to encapsulate complex processing logic directly within SQL. SQL Macros allow developers to encapsulate complex processing within a new structure called a “macro” which can then be used within SQL statement. Essentially there two types of SQL Macros: SCALAR and TABLE.

What is the difference between procedure and function?

Function is used to calculate something from a given input. Hence it got its name from Mathematics. While procedure is the set of commands, which are executed in a order.

Why SP is 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.

Does Teradata have stored procedures?

A stored procedure contains a set of SQL statements and procedural statements. These features provide a server-based procedural interface to Teradata Database for application programmers. Stored procedures can be a great benefit for some tactical query applications.

How do I run a procedure in Teradata?

Executing Stored Procedures Use the Teradata SQL CALL statement to execute a stored procedure interactively: CALL samplesp1 (8888, pAmount); If the procedure is created with parameters, specify the parameter arguments within the parenthesis.

What is the difference between macro and stored procedure in Teradata?

Difference between Macro and Stored procedure in Teradata 1 It will return set of rows to the user 1. It may return 1 or more values to client as parameters (not rows) 2 May contain BTEQ commands 2. May contain comprehensive SPL 3 A macro that allows only input values 3. SP that allows both input and output values 4 It can fetch rows directly

What is the difference between stored procedure and macro?

Difference between Stored Procedure and Macro? It does not return rows to the user. It returns set of rows to the user.

What are the characteristics of a bteq macro?

1. It may return 1 or more values to client as parameters (not rows) 2. May contain BTEQ commands 2. May contain comprehensive SPL 3. A macro that allows only input values 3. SP that allows both input and output values 4. It can fetch rows directly 4. It must use cursors to fetch the rows.

What is the difference between macro and procedure in microcontroller?

2. Procedure : Procedures are also like macro, but they are used for large set of instruction when macro is useful for small set of instructions. It contains a set of instructions which performs a specific task.