- What is PL SQL block?
- What are the differences between SQL and PL SQL?
- What is the purpose of triggers?
- How many types of literals are available in PL SQL?
- How PL SQL engine works in Oracle?
- What is PL SQL cursor?
- What are the advantages of SQL?
- Is SQL same as MySQL?
- Is PL SQL only for Oracle?
- Which software is used for PL SQL programming?
- Why we use PL SQL instead of SQL?
- What are the advantages of PL?
- What triggers SQL?
- What are advantages and disadvantages of PL SQL?
- Why is it more efficient to combine SQL statements into PL SQL blocks?
- What is the purpose of PL SQL?
- Is PL SQL a programming language?
- Can I use PL SQL in SQL Server?
What is PL SQL block?
A block is a unit of code that provides execution and scoping boundaries for variable declarations and exception handling.
PL/SQL allows you to create anonymous blocks (blocks of code that have no name) and named blocks, which may be packages, procedures, functions, triggers, or object types..
What are the differences between SQL and PL SQL?
SQL is data oriented language. PL/SQL is application oriented language. SQL is used to write queries, create and execute DDL and DML statments. PL/SQL is used to write program blocks, functions, procedures, triggers and packages.
What is the purpose of triggers?
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.
How many types of literals are available in PL SQL?
four typesWe’ll cover four types of literals – text literals, integer literals, number, and date/time literals.
How PL SQL engine works in Oracle?
The PL/SQL engine then separates the SQL statements and PL/SQL statements and passes it down to its respective executors. This engine parses, fetches and executes the SQL statements and returns the resultant or the exceptions occurred during the processing of the statement in the user’s session or to the PL/SQL engine.
What is PL SQL cursor?
A cursor is a pointer to this context area. … PL/SQL controls the context area through a cursor. A cursor holds the rows (one or more) returned by a SQL statement. The set of rows the cursor holds is referred to as the active set.
What are the advantages of SQL?
Advantages of SQLHigh speed. Using the SQL queries, the user can quickly and efficiently retrieve a large amount of records from a database.No coding needed. In the standard SQL, it is very easy to manage the database system. … Well defined standards. … Portability. … Interactive language. … Multiple data view.
Is SQL same as MySQL?
SQL is a query language, whereas MySQL is a relational database that uses SQL to query a database. … SQL follows a standard format wherein the basic syntax and commands used for DBMS and RDBMS remain pretty much the same, whereas MySQL receives frequent updates.
Is PL SQL only for Oracle?
PL/SQL only can execute in an Oracle Database. It was not designed to use as a standalone language like Java, C#, and C++. In other words, you cannot develop a PL/SQL program that runs on a system that does not have an Oracle Database. PL/SQL is a high-performance and highly integrated database language.
Which software is used for PL SQL programming?
SQL* Plus is an interactive tool that allows you to type SQL and PL/SQL statements at the command prompt.
Why we use PL SQL instead of 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 are the advantages of PL?
Tight Integration with SQL PL/SQL lets you use all SQL data manipulation, cursor control, and transaction control statements, and all SQL functions, operators, and pseudocolumns. PL/SQL fully supports SQL data types. You need not convert between PL/SQL and SQL data types.
What triggers SQL?
A trigger is a special type of stored procedure that automatically runs when an event occurs in the database server. DML triggers run when a user tries to modify data through a data manipulation language (DML) event. DML events are INSERT, UPDATE, or DELETE statements on a table or view.
What are advantages and disadvantages of PL SQL?
The main disadvantages of PL/SQL is its lack of portability….Advantages of PL/SQLsupport 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?
Why is it more efficient to combine SQL statements into PL/SQL blocks? It is more important because when you include sql statements into pl/sql blocks there is less network traffic which in turn means better performance. 2.
What is the purpose of PL SQL?
PL/SQL Introduction. PL/SQL is a block structured language that enables developers to combine the power of SQL with procedural statements. All the statements of a block are passed to oracle engine all at once which increases processing speed and decreases the traffic.
Is PL SQL a programming language?
PL/SQL, or Procedural Language for SQL, is an extension for SQL in the Oracle database management system. Similar to general-purpose programming languages, PL/SQL includes elements like conditions and loops. With PL/SQL, you can also declare constants, variables, variable types, procedures, and functions.
Can I use PL SQL in SQL Server?
T-SQL performs best with Microsoft SQL server. PL-SQL performs best with Oracle database server. 5. With help of BULK INSERT statement in T-SQL users can input multiple rows.