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What is PL/SQL?
PL/SQL is an acronym for Programming Language/SQL. Structured Query Language (SQL) is a scripting language. PL/SQL block can contain any number of SQL statements integrated with flow of control statements.
What are the advantages of PL/SQL?
PL/SQL is a completely portable, high-performance transaction processing language that offers the following advantages : Support for SQL Support for object–oriented programming Better performance Higher productivity Full portability Tight integration with Oracle Tight security
What are the types of PL/SQL block?
A PL/SQL block consisting of different sections. Declaration Section Executable Commands Section Exception Handling section
What are the structure of PL/SQL block?
Declare declarations Begin executable statements Exception exception handlers End;
What is the difference between SQL vs SQL*PLUS?
SQL stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems. This language is non procedural. SQL *PLUS is an Oracle specific program, which accepts and executes SQL commands and PL/SQL blocks. SQL *PLUS allow us to manipulate SQL commands and PL/SQL blocks.
Why use pl/sql?
It acts as a support for sql. PL/SQL allows to declare variables and constants and use them in sql and procedural statements. Control structures are the most important PL/SQL extension of SQL. A PL/SQL cursor gives you a way to fetch and process database information. Errors are easily detected and handled.
What is a Recursive Subprogram?
A recursive subprogram is one that calls itself. Each recursive call creates a new instance of any items declared in the subprogram, including parameters, variables, cursors, and exceptions.
What is Dynamic SQL?
Dynamic SQL statements built as character strings built at run time. The strings contain the text of a SQL statement or PL/SQL block. They can also contain placeholders for bind arguments. Placeholder names are prefixed by a colon, and the names themselves do not matter.
The assigning of values to PL/SQL variables in SQL statements is called binding.
What are the different types of PL/SQL bindings?
PL/SQL binding operations fall into three categories are : In–bind : When a PL/SQL variable or host variable is stored in the database by an INSERT or UPDATE statement. Out–bind : When a database value is assigned to a PL/SQL variable or a host variable by the RETURNING clause of an INSERT, UPDATE, or DELETE statement. Define : When a database value is assigned to a PL/SQL variable or a host variable by a SELECT or FETCH statement.