Flashcards on PL/SQL

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What does PL/SQL stand for?

PL/SQL stands for Procedural Language/Structured Query Language.

What is PL/SQL used for?

PL/SQL is used to write code for Oracle databases.

What are the basic components of PL/SQL?

The basic components of PL/SQL are variables, loops, conditional statements, and subprograms.

What is a cursor in PL/SQL?

A cursor is a database object that allows you to retrieve and manipulate data row by row.

What is the difference between a function and a procedure in PL/SQL?

A function returns a value, while a procedure does not.

How do you create a PL/SQL block?

You can create a PL/SQL block in SQL*Plus by enclosing a set of SQL or PL/SQL statements between the keywords BEGIN and END.

What is an exception in PL/SQL?

An exception is an error condition that arises during the execution of a PL/SQL block.

What is a trigger in PL/SQL?

A trigger is a special type of PL/SQL block that is automatically executed in response to certain events or changes in the database.

What is the syntax for declaring a variable in PL/SQL?

To declare a variable in PL/SQL, use the keyword DECLARE followed by the variable name and data type.

What is the difference between a global and local variable in PL/SQL?

A global variable can be accessed from anywhere in the PL/SQL block, while a local variable can only be accessed within the block in which it is declared.

What is a package in PL/SQL?

A package is a container that allows you to group related PL/SQL objects and subprograms.

What is a view in PL/SQL?

A view is a virtual table that is based on the result of a SELECT statement. It does not store any data itself.

What is the difference between a view and a table in PL/SQL?

A table stores data, while a view does not. A view is a virtual table that is based on the result of a SELECT statement.

What is a sequence in PL/SQL?

A sequence is an object that generates a sequence of unique numbers in Oracle databases.

What is a synonym in PL/SQL?

A synonym is an alternative name for a database object, such as a table or view.

What does PL/SQL stand for?

PL/SQL stands for Procedural Language/Structured Query Language.

What is PL/SQL used for?

PL/SQL is used to write code for Oracle databases.

What are the basic components of PL/SQL?

The basic components of PL/SQL are variables, loops, conditional statements, and subprograms.

What is a cursor in PL/SQL?

A cursor is a database object that allows you to retrieve and manipulate data row by row.

What is the difference between a function and a procedure in PL/SQL?

A function returns a value, while a procedure does not.

How do you create a PL/SQL block?

You can create a PL/SQL block in SQL*Plus by enclosing a set of SQL or PL/SQL statements between the keywords BEGIN and END.

What is an exception in PL/SQL?

An exception is an error condition that arises during the execution of a PL/SQL block.

What is a trigger in PL/SQL?

A trigger is a special type of PL/SQL block that is automatically executed in response to certain events or changes in the database.

What is the syntax for declaring a variable in PL/SQL?

To declare a variable in PL/SQL, use the keyword DECLARE followed by the variable name and data type.

What is the difference between a global and local variable in PL/SQL?

A global variable can be accessed from anywhere in the PL/SQL block, while a local variable can only be accessed within the block in which it is declared.

What is a package in PL/SQL?

A package is a container that allows you to group related PL/SQL objects and subprograms.

What is a view in PL/SQL?

A view is a virtual table that is based on the result of a SELECT statement. It does not store any data itself.

What is the difference between a view and a table in PL/SQL?

A table stores data, while a view does not. A view is a virtual table that is based on the result of a SELECT statement.

What is a sequence in PL/SQL?

A sequence is an object that generates a sequence of unique numbers in Oracle databases.

What is a synonym in PL/SQL?

A synonym is an alternative name for a database object, such as a table or view.

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