What is PL SQL in 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 the different ways in which PL SQL can run?
You can run a procedure or function interactively by: Using an Oracle tool, such as SQL*Plus. Calling it explicitly in the code of a database application, such as an Oracle Forms or precompiler application. Calling it explicitly in the code of another procedure or trigger.
Why PL SQL is used in Oracle?
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. PL/SQL automatically inherits the robustness, security, and portability of the Oracle Database.
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 are PL SQL data types?
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.
Is PL SQL Oracle Database?
What is Oracle cursor?
To execute a multi-row query, Oracle opens an unnamed work area that stores processing information. A cursor lets you name the work area, access the information, and process the rows individually.
What type of SQL is Oracle?
Although both systems use a version of Structured Query Language, or SQL, MS SQL Server uses Transact SQL, or T-SQL, which is an extension of SQL originally developed by Sybase and used by Microsoft. Oracle, meanwhile, uses PL/SQL, or Procedural Language/SQL.
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
How to prepare the best answers to any interview questions?
Research: Learn as much as you can about the company and the position.
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