Why do we need procedural SQL?
PL/SQL gives high productivity to programmers as it can query, transform, and update data in a database. PL/SQL saves time on design and debugging by strong features, such as exception handling, encapsulation, data hiding, and object-oriented data types.
What is the purpose of using PL SQL?
Function. The purpose of a PL/SQL function is generally used to compute and return a single value. This returned value may be a single scalar value (such as a number, date or character string) or a single collection (such as a nested table or array).
What is advantage of PL SQL is a procedural language?
PL/SQL offers the following advantages over any other procedural language: support for SQL, closer integration with Oracle leading to better performance, and. support for object-oriented programming.
Why is it more efficient to combine SQL statements into PL SQL blocks?
Answer: It is more efficient to use SQL statements within PL/SQL blocks because network traffic can be decreased significantly, and an application becomes more efficient as well. … If multiple SELECT statements are issued, the network traffic can increase significantly very quickly.
Which is better SQL or PL SQL?
PL/SQL stands for “Procedural language extensions to SQL.” PL/SQL is a database-oriented programming language that extends SQL with procedural capabilities.
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Comparisons of SQL and PLSQL:
| SQL | PLSQL |
|---|---|
| It directly interacts with the database server. | It does not interacts directly with the database server. |
Is PL SQL still used?
The answer is that PL/SQL is not growing, but not going away either. Because it is used in the Oracle database, and the Oracle database is a fixture of enterprise systems world-wide, it will outlive you. High-performance batch processing has to happen close to the data, so PL/SQL will continue to rule in this area.
Is PL SQL only for Oracle?
The PL/SQL engine can only be installed in an Oracle Database server or an application development tool such as Oracle Forms.
What is required for PL SQL?
System requirements
The supported Oracle Server versions are 7. x, 8. x, 8i, 9i, 10g, 11g, 12c, 18c and 19c on any platform. To connect to an Oracle database, the 32 bit PL/SQL Developer version requires a 32 bit Oracle Client and the 64 bit PL/SQL Developer version requires a 64 bit Oracle Client.
What are the advantages and disadvantages of PL SQL?
Advantage of Using PL/SQL
- Better performance, as SQL is executed in bulk rather than a single statement.
- High Productivity.
- Tight integration with SQL.
- Full Portability.
- Tight Security.
- Support Object Oriented Programming concepts.
What is the purpose of trigger?
Triggers are used to maintain the referential integrity of data by changing the data in a systematic fashion. Each trigger is attached to a single, specified table in the database. Triggers can be viewed as similar to stored procedures in that both consist of procedural logic that is stored at the database level.
What is PL SQL procedure?
The PL/SQL stored procedure or simply a procedure is a PL/SQL block which performs one or more specific tasks. … The procedure contains a header and a body. Header: The header contains the name of the procedure and the parameters or variables passed to the procedure.