What does a stored proc do?
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What does a stored proc do?
A stored procedure provides an important layer of security between the user interface and the database. It supports security through data access controls because end users may enter or change data, but do not write procedures.
Why we need stored procedure in SQL?
The main purpose of stored procedures in SQL is to hide direct SQL queries from the code and improve the performance of database operations such as select, update, and delete data. Other advantages of procedure in SQL are: Reduces the amount of information sent to the database server.
How do I write an if statement in Oracle?
The syntax for IF-THEN-ELSE in Oracle/PLSQL is: IF condition THEN {… statements to execute when condition is TRUE…} ELSE {… statements to execute when condition is FALSE…}
Why are stored procedures bad?
Stored procedures are difficult to unit test. With an ORM, you can mock your database code so as to be able to test your business logic quickly. With stored procedures, you have to rebuild an entire test database from scratch. Stored procedures offer no performance advantage whatsoever.
What are the conditional statements in Oracle?
The condition is a Boolean variable, constant, or expression that evaluates to TRUE, FALSE, or NULL. If condition evaluates to TRUE, the executable statements found after the THEN keyword and before the matching END IF statement are executed. If condition evaluates to FALSE or NULL, those statements are not executed.
How we use if else in PL SQL?
PL/SQL – IF-THEN-ELSIF Statement
- It’s ELSIF, not ELSEIF.
- An IF-THEN statement can have zero or one ELSE’s and it must come after any ELSIF’s.
- An IF-THEN statement can have zero to many ELSIF’s and they must come before the ELSE.
- Once an ELSIF succeeds, none of the remaining ELSIF’s or ELSE’s will be tested.
Can we write if statement in SELECT?
This isn’t what the requester wanted, but is very useful to know that you can use if statements outside a select statement. EXISTS is good because it kicks out of the search loop if item is found. A COUNT runs until the end of table rows. Nothing to do with question, but something to know.
