What are the main topics in Plsql?

Table of Contents

Oracle PL/SQL Important Topics

Data Types.
Literals (Constants)
Declaring Variables.
Is Null / Is Not Null.
Primary Keys.
Foreign Keys.
Unique Constraints.
Check Constraints.

Which function will you use to transfer a PL SQL table log to a database table?

To transfer a PL/SQL table log a database log table function “PROCEDURE ps2db” is used.

What is difference between SQL and Plsql?

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 PL SQL Oracle?

PL/SQL is a procedural language designed specifically to embrace SQL statements within its syntax. PL/SQL program units are compiled by the Oracle Database server and stored inside the database. And at run-time, both PL/SQL and SQL run within the same server process, bringing optimal efficiency.

What are data types in PL SQL?

PL/SQL has two kinds of data types: scalar and composite. The scalar types are types that store single values such as number, Boolean, character, and datetime whereas the composite types are types that store multiple values, for example, record and collection.

What is basic structure of PL SQL?

A PL/SQL block consists of three sections: declaration, executable, and exception-handling sections. In a block, the executable section is mandatory while the declaration and exception-handling sections are optional. A PL/SQL block has a name.

How can I print 1 to 100 numbers in SQL?

Query

; with CTE as.
(
select 1 Number.
union all.
select Number +1 from CTE where Number<100.
)
select *from CTE.

How do you delete duplicate records in Oracle?

To delete duplicate records in Oracle, start by making sure the records are actually duplicates by entering the Standard Query Language, or SQL. After entering “SQL,” search for what you want to delete, like “delete from names where name = ‘Alan. ‘” Then, enter “commit” for this command to take effect.

What is bulk collection in Oracle PL SQL?

A bulk collect is a method of fetching data where the PL/SQL engine tells the SQL engine to collect many rows at once and place them in a collection. The SQL engine retrieves all the rows and loads them into the collection and switches back to the PL/SQL engine. All the rows are retrieved with only 2 context switches.

What are the good SQL Developer interview questions?

This interview question targets the developer’s knowledge of the SQL server roles and the authority/permissions related to them. SQL Server roles are similar to Active Directory groups on Windows. They enable a server or database administrator to assign database-wide function(s) to an individual or group.

What to know for SQL in interview?

Meets academic and training requirements outlined in the job description

Ability to adapt knowledge to the benefit of hands-on work

Critical thinking to understand the SQL role within your company

How to prepare the best answers to any interview questions?

Research: Learn as much as you can about the company and the position.

Planning: Carefully consider what to wear and how to present yourself professionally.

Practice: Reflect on the most effective ways to discuss common interview subjects.

How to answer the most frequently asked interview questions?

buying. This is the single most important strategy in executive job hunting. So, before you answer this or any question, it’s imperative that you try to uncover your interviewer’s greatest need, want, problem or goal. To do so, make sure you take these two steps: (1) Do all the homework you can before the interview to uncover this person’s