Why a procedural language like PL SQL is needed?
The purpose of PL/SQL is to combine database language and procedural programming language. … Because PL/SQL enables users to mix SQL statements with procedural constructs, it is possible to use PL/SQL blocks and subprograms to group SQL statements before sending them to Oracle for execution.
Why we use PL SQL over SQL?
PL/SQL allows sending an entire block of statements to the database at one time. This reduces network traffic and provides high performance for the applications. PL/SQL gives high productivity to programmers as it can query, transform, and update data in a database.
Which one is true for advantage of PL SQL?
The Advantage of PL/SQL is –
PL/SQL provides high security level. PL/SQL provides access to predefined SQL packages.
Where do we use 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).
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. |
What is PL SQL explain with example?
PL/SQL is basically a procedural language, which provides the functionality of decision making, iteration and many more features of procedural programming languages.
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PL/SQL Introduction.
| SQL | PL/SQL |
|---|---|
| Execute as a single statement. | Execute as a whole block. |
| Mainly used to manipulate data. | Mainly used to create an application. |
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.
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.
Is Vs as in PL SQL?
Question: What is the difference between ‘IS’ and ‘AS’ in PL/SQL? Answer: The PL/SQL language evolved such the the “IS” and “AS” operators are equivalent. Functionally the “IS” and “AS” syntax performs identical functions and can be used interchangeably.
Is PL SQL different from SQL?
The basic difference between two languages is that SQL executes the single query at a time whereas, Pl/SQL executes the block of code at once. SQL is a Structured Query Language whereas, PL/SQL is a Procedural Language/ Structured Query Language. … You can embed SQL queries within the syntax of PL/SQL.
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.