What is PL pgSQL used for?

What is PL pgSQL used for?

PL/pgSQL procedural language adds many procedural elements, e.g., control structures, loops, and complex computations, to extend standard SQL. It allows you to develop complex functions and stored procedures in PostgreSQL that may not be possible using plain SQL.

What is $$ in PostgreSQL?

In PostgreSQL, the dollar-quoted string constants ($$) is used in user-defined functions and stored procedures. In PostgreSQL, you use single quotes for a string constant like this: select ‘String constant’; When a string constant contains a single quote (‘), you need to escape it by doubling up the single quote.

What is the query language used in PostgreSQL?

SQL
SQL is the language PostgreSQL and most other relational databases use as query language. It’s portable and easy to learn. But every SQL statement must be executed individually by the database server.

Can we create package in PostgreSQL?

CREATE PACKAGE BODY defines a new package body. CREATE OR REPLACE PACKAGE BODY will either create a new package body, or replace an existing body. If a schema name is included, then the package body is created in the specified schema. Otherwise it is created in the current schema.

Does redshift support PL SQL?

You can work with transaction control statements in the PL/pgSQL language that Amazon Redshift uses. For information about using the statements COMMIT, ROLLBACK, and TRUNCATE within a stored procedure, see Managing transactions.

Is Postgres a language?

PL/pgSQL (Procedural Language/PostgreSQL) is a procedural programming language supported by the PostgreSQL ORDBMS. The language is able to be defined as trusted by the server. PL/pgSQL is one of the programming languages included in the standard PostgreSQL distribution, the others being PL/Tcl, PL/Perl and PL/Python.

Is Postgres a NoSQL database?

PostgreSQL is not NoSQL. PostgreSQL is a classical, relational database server (and syntax) supporting most of the SQL standards.

Is Postgres a SQL database?

PostgreSQL is an advanced, enterprise class open source relational database that supports both SQL (relational) and JSON (non-relational) querying. PostgreSQL is used as the primary data store or data warehouse for many web, mobile, geospatial, and analytics applications. The latest major version is PostgreSQL 12.

What type of database is PostgreSQL?

PostgreSQL is an advanced, enterprise class open source relational database that supports both SQL (relational) and JSON (non-relational) querying.

Does Postgres have packages like Oracle?

As written before postgresql has no packages. Example with namespace. It can be placed in single sql file.

How do I create a cursor in PostgreSQL?

One way to create a cursor variable is just to declare it as a variable of type refcursor. Another way is to use the cursor declaration syntax, which in general is: name [ [ NO ] SCROLL ] CURSOR [ ( arguments ) ] FOR query; (FOR can be replaced by IS for Oracle compatibility.)