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In this article, we are going to learn the difference Between SQL and PLSQL. I will explain PLSQLand SQL in brief first. Afterward, we are going to discuss their difference. Then, I will explain difference with real-time scenario code. So, It’s my humble request to read this article ultimately to gain and spread knowledge.
SQL is a Structured Query language that operates the database. It includes database creation, deletes, retrieval of specific data from the database.SQL is an ANSI (American National Standards Institute) standard language, but there are many different versions of SQL language.
SQL is a standardized programming language that is used to manage relational databases and perform various operations in their data.SQL is a structured query language, a computer language for storing, manipulating, and retrieving store data in a relational database. It’s necessary to understand SQL before I would discuss the difference Between pl SQL and PLSQL. So, I am taking it as you know SQL basics now.
PL/SQL is programmable SQL, which means we can do the programming by writing SQL queries. PL/SQL is a programming language SQL. It is used to write entire programs with variables, loops, operators, etc. It is mainly used to select/insert/update/delete. It supports the back-end of application languages such as Java, PHP, etc. It allows those reports, web pages, and screens to be created, formatted, and displayed. Now we can discuss the “difference Between SQL and PLSQL” as we know SQL and PL/SQL both.
PL/SQL enables a code block to be executed that improves its performance. It can be procedure, function, cursors, triggers, or loops. PL/SQL is intended for the creation of server pages and web applications. PL/SQL inhibits such characteristics as encapsulation, hiding of data, exceptions, and object-based sort of data.
Difference At a Glance
We can summarize key difference between sql and plsql as follows:
|SQL is Structured Query Language.||PLSQL is programming language using SQL.|
|In SQL, there is unavailability of data variable. We can’t have data variables here||In PLSQL, there is availability of data variable. We can have data variables here|
|Loops and Control Structures are not supported.||Control Structures and loops are supported.we can use loop, While loop, etc.|
|Query performs single operation.||In PLSQL, Group of Operation as single block.|
|Is is declarative language.||it is procedural language.|
|We can have SQL inside PLSQL||We can have PLSQL inside SQL.|
|SQL interacts with the corresponding server directly.||PLSQL does not interacts with the database server directly.|
|SQL is Data oriented language.||PLSQL is application oriented language.|
|It is used to perform DDL and DML operation and we can write queries.||we can write program functions, blocks, triggers, procedures and SSIS packages.|
Difference Between sql and plsql
We can differentiate thes on basis of following key points:
SQL stands for Structured Query Language whereas PL/SQL stands for Programmable Structured Query Language.
In SQL, we can execute single command or query at a time. The query can be and DDL (Data Definition Language) or DML (Data manipulation language). DDL is used to add, remove or modify tables(db objects). DML is used to Insert, update or delete data from tables.
On the other hand, PL/SQL is bloc of commands or code which helps us to accomplish multiple task at a time. It can consist of several SQL queries, loops, functions. So many tasks are performed at a time here.
Use of variable
We don’t have variable in sql, on the other hand PL/Sql has variable data type, etc.
We can not use loops in SQL where as we can use loops in PL/Sql. We can add if/else and other conditional statement in pl sql. PL/Sql supports al types of control statement but SQL does not.
We can use Control Structures as shown below only in PL/Sql.
if (db_name() != N'master') begin raiserror(5001, 16,-1) return 1 end
Type of Language
Sql is declarative language. So, SQL advises the client what to do but not how to do so. whereas PL/Sql is procedural language. So, PL/SQL says how to do work to the database
Please have a look at below example, the will show this difference
SELECT * FROM tableName; -- SQL -- PL/SQL USE [MVCFinalExam] GO /****** Object: StoredProcedure [sys].[sp_changesubscriber_schedule] Script Date: 28-11-2020 15:35:59 ******/ SET ANSI_NULLS OFF GO SET QUOTED_IDENTIFIER OFF GO ALTER procedure [sys].[sp_changesubscriber_schedule] ( @subscriber sysname, @agent_type smallint, @frequency_type int = NULL, @frequency_interval int = NULL, @frequency_relative_interval int = NULL, @frequency_recurrence_factor int = NULL, @frequency_subday int = NULL, @frequency_subday_interval int = NULL, @active_start_time_of_day int = NULL, @active_end_time_of_day int = NULL, @active_start_date int = NULL, @active_end_date int = NULL, @publisher sysname = NULL ) AS BEGIN DECLARE @cmd nvarchar(4000) DECLARE @retcode int DECLARE @publisher_type sysname SET @retcode = 0 EXEC @retcode = sys.sp_MSrepl_getpublisherinfo @publisher = @publisher, @rpcheader = @cmd OUTPUT, @publisher_type = @publisher_type OUTPUT IF @retcode <> 0 RETURN (@retcode) -- Add sp SET @publisher = UPPER(@publisher) COLLATE DATABASE_DEFAULT set @cmd = @cmd + N'sys.sp_MSrepl_changesubscriber_schedule' EXEC @retcode = @cmd @subscriber, @agent_type, @frequency_type, @frequency_interval, @frequency_relative_interval, @frequency_recurrence_factor, @frequency_subday, @frequency_subday_interval, @active_start_time_of_day, @active_end_time_of_day, @active_start_date, @active_end_date, @publisher, @publisher_type RETURN (@retcode) END
SQL is a language for choosing and editing data sets that is data-oriented. On the other hand PL / SQL is an application programming language.
Communication With Database
SQL communicates directly with the database server. But, PL/SQL does not communicate explicitly with the database server.
PL/SQL can have SQL but SQl queries cannot have PL/SQL.
We can use exception handling in PL/SQL. We can use try/catch block inside PL/SQL. Whereas we can’t do same in plain SQL. SQL queries can’t have this.
An Example of complex query
USE [MVCFinalExam] GO /****** Object: StoredProcedure [sys].[sp_who] Script Date: 28-11-2020 15:44:14 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER procedure [sys].[sp_who] --- 1995/11/28 15:48 @loginame sysname = NULL --or 'active' as declare @spidlow int, @spidhigh int, @spid int, @sid varbinary(85) select @spidlow = 0 ,@spidhigh = 32767 if ( @loginame is not NULL AND upper(@loginame collate Latin1_General_CI_AS) = 'ACTIVE' ) begin select spid , ecid, status ,loginame=rtrim(loginame) ,hostname ,blk=convert(char(5),blocked) ,dbname = case when dbid = 0 then null when dbid <> 0 then db_name(dbid) end ,cmd ,request_id from sys.sysprocesses_ex where spid >= @spidlow and spid <= @spidhigh AND upper(cmd) <> 'AWAITING COMMAND' return (0) end if (@loginame is not NULL AND upper(@loginame collate Latin1_General_CI_AS) <> 'ACTIVE' ) begin if (@loginame like '[0-9]%') -- is a spid. begin select @spid = convert(int, @loginame) select spid, ecid, status, loginame=rtrim(loginame), hostname,blk = convert(char(5),blocked), dbname = case when dbid = 0 then null when dbid <> 0 then db_name(dbid) end ,cmd ,request_id from sys.sysprocesses_ex where spid = @spid end else begin select @sid = suser_sid(@loginame) if (@sid is null) begin raiserror(15007,-1,-1,@loginame) return (1) end select spid, ecid, status, loginame=rtrim(loginame), hostname ,blk=convert(char(5),blocked), dbname = case when dbid = 0 then null when dbid <> 0 then db_name(dbid) end ,cmd ,request_id from sys.sysprocesses_ex where sid = @sid end return (0) end -- loginame arg is null select spid, ecid, status, loginame=rtrim(loginame), hostname, blk=convert(char(5),blocked), dbname = case when dbid = 0 then null when dbid <> 0 then db_name(dbid) end ,cmd ,request_id from sys.sysprocesses_ex where spid >= @spidlow and spid <= @spidhigh return (0) -- sp_who
Select * from table_name
PL/SQL gives programmers high efficiency as data in a database can be queried, transformed, and modified. PL/SQL saves time with robust features, including exception management, encapsulation, data hiding, object-oriented data types on design, and debugging. PL/SQL applications are fully portable Applications
Oracle uses PL/SQL or Procedural Language/SQL in the interim, which are both “flavors” and SQL dialects, with different syntaxes and abilities in the two languages. The most significant difference between the two languages is how variables, stored procedures, and integrated functions are treated.
PL/SQL is an extension of Oracle’s SQL procedure language. You can combine SQL statements with procedural constructs using PL/SQL. There was a mistake. Oracle also allows for creating and storing procedures-like functions and packages that are method groups and functions.
PL/SQL is essentially a procedural language that provides the functionality of decision-making, iteration, and many other features of the proceedings’ programming language. A PL/SQL unit can be built, such as procedures, functions, packages, triggers, and types stored in the database for applications to be reused.
The response is, PL/SQL does not increase but also does not vanish. It’s a fixture in enterprises’ systems worldwide since it’s used in the Oracle database, and the Oracle database will withstand you. The data must be processed close to high-performance batch processing, so PL/SQL continues to monitor this region.
Furthermore, PL/SQL offers a broader programming language solution to develop Oracle Databases for mission-critical applications. PL/SQL is a language that is highly organized and readable.
Although MySQL is a relational database that utilizes SQL to query a database, SQL is a query language. There was a mistake. SQL is a standard format where the primary DBMS and RDBMS syntax and commands remain essentially the same while MySQL is modified periodically.
SQL Plus is an interactive method for entering SQL and PL/SQL command statements.
The Oracle Corporation’s SQL and Oracle relational database procedural extensions (PL/SQL). PL/SQL is available in Oracle Database (from versions 6 – PL/SQL procedures/functions/packages/triggers since Version 7), Times Ten (from version 11.2.1) and IBM DB 2 (from version 9.7). With the subsequent releases of Oracle Database, Oracle Corporation is usually expanded with PL/SQL features.
SQL is a declarative language, it only defines which data is required. But PL/SQL is a procedural language that defines both what data is expected and how it can be extracted.