Is PL SQL case sensitive?
PL/SQL keywords are not case-sensitive, so lower-case letters are equivalent to corresponding upper-case letters except within string and character literals. A line of PL/SQL text contains groups of characters known as lexical units: Delimiters (simple and compound symbols)
What is delimiter in PL SQL?
A delimiter is a simple or compound symbol that has a special meaning to PL/SQL. For example, you use delimiters to represent arithmetic operations such as addition and subtraction.
What are the most important characteristics of PL 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. Applications written in PL/SQL are fully portable.
What is PL SQL good for?
Portions of applications: PL/SQL program units can return a set of values (functions), or PL/SQL routines can perform database operations (procedures). These functions and procedures may be called by other functions and procedures or (in the case of functions) used in SQL statements.
Where do we declare PL SQL?
You must declare the PL/SQL variable in the declaration section or in a package as a global variable. After the declaration, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name.
How do you comment in PL SQL?
PL/SQL supports two comment styles: single-line and multi-line. A double hyphen ( – – ) anywhere on a line (except within a character literal) turns the rest of the line into a comment. Multi-line comments begin with a slash-asterisk ( /* ) and end with an asterisk-slash ( */ ). For more information, see “Comments”.
What is PL SQL with example?
PL/SQL is a block structured language that enables developers to combine the power of SQL with procedural statements….PL/SQL Introduction.
| SQL | PL/SQL |
|---|---|
| SQL is a single query that is used to perform DML and DDL operations. | PL/SQL is a block of codes that used to write the entire program blocks/ procedure/ function, etc. |
What are the types of PL SQL blocks?
PL/SQL blocks can include variables, SQL statements, loops, constants, conditional statements and exception handling. Blocks can also build a function or a procedure or a package. 1. Anonymous blocks: In PL/SQL, That’s blocks which is not have header are known as anonymous blocks.
Which is better SQL or PL SQL?
Procedural language capability: It consists of procedural language constructs like conditional statements (if else statements) and loops like (FOR loops). Better performance: PL/SQL engine processes multiple SQL statements at the same time as one block, thereby reducing network traffic.
What are the different goals of PL SQL?
PL/SQL has these advantages:
- Tight Integration with SQL.
- High Performance.
- High Productivity.
- Portability.
- Scalability.
- Manageability.
- Support for Object-Oriented Programming.
- Support for Developing Web Applications.
Is PL SQL difficult?
Oracle is fundamentally just like SQL Server and every other relational database system. Its database architectural principles are the same and it operates with SQL (Structured Query Language), plus Oracle’s own PL/SQL extensions. It’s relatively easy to learn — as long as you have a good handle on Linux and SQL.
Is PL SQL good for Career?
PL SQL is an integrated and high-performance database language that can work well with other languages like C++, Java, and C#. However, if you want to write a code that is going to interact with Oracle database, there is no better language than PL SQL for this job.