REQUEST COMPLIMENTARY SQLS*PLUS LICENCE
PostgreSQL substring function
PostgreSQL substring function allows extracting substring from a string.
Syntax of the substring function in PostgreSQL
substring( string [from start_position] [for length] )
Parameters and function arguments
- string – Source line.
- start_position – Optional. This is the initial position to extract. If this parameter is not specified, the substring function will start from position 1 (which is the first position in the string).
- length – Optional. This is the number of characters to be extracted. If this parameter is not specified, the substring function will return the whole line (from start_position to the end of the string).
Note:
- The first position in the string is 1.
The substring function can be used in the following PostgreSQL versions
PostgreSQL 11, PostgreSQL 10, PostgreSQL 9.6, PostgreSQL 9.5, PostgreSQL 9.4, PostgreSQL 9.3, PostgreSQL 9.2, PostgreSQL 9.1, PostgreSQL 9.0, PostgreSQL 8.4.
Consider some examples of the substring function to understand how to use the substring function in PostgreSQL.
For example:
SELECT substring('Google.com' for 6);
--Result: Google
SELECT substring('Google.com' from 1 to 6);
--Result: Google
SELECT substring('Google.com' from 2 for 5);
--Result: oogle
SELECT substring('Google.com' from 5 to 8);
--Result: le.com
SELECT substring('Google.com' from 8 to 3);
--Result: com
SELECT substring('Google.com' from 8);
--Result: com
Learn PostgreSQL Tutorial – Full Course for Beginners
MORE NEWS
PreambleNoSql is not a replacement for SQL databases but is a valid alternative for many situations where standard SQL is not the best approach for...
PreambleMongoDB Conditional operators specify a condition to which the value of the document field shall correspond.Comparison Query Operators $eq...
5 Database management trends impacting database administrationIn the realm of database management systems, moreover half (52%) of your competitors feel...
The data type is defined as the type of data that any column or variable can store in MS SQL Server. What is the data type? When you create any table or...
PreambleMS SQL Server is a client-server architecture. MS SQL Server process starts with the client application sending a query.SQL Server accepts,...
First the basics: what is the master/slave?One database server (“master”) responds and can do anything. A lot of other database servers store copies of all...
PreambleAtom Hopper (based on Apache Abdera) for those who may not know is an open-source project sponsored by Rackspace. Today we will figure out how to...
PreambleMongoDB recently introduced its new aggregation structure. This structure provides a simpler solution for calculating aggregated values rather...
FlexibilityOne of the most advertised features of MongoDB is its flexibility. Flexibility, however, is a double-edged sword. More flexibility means more...
PreambleSQLShell is a cross-platform command-line tool for SQL, similar to psql for PostgreSQL or MySQL command-line tool for MySQL.Why use it?If you...
PreambleWriting an application on top of the framework on top of the driver on top of the database is a bit like a game on the phone: you say “insert...
PreambleOracle Coherence is a distributed cache that is functionally comparable with Memcached. In addition to the basic function of the API cache, it...
PreambleIBM pureXML, a proprietary XML database built on a relational mechanism (designed for puns) that offers both relational ( SQL / XML ) and...
What is PostgreSQL array? In PostgreSQL we can define a column as an array of valid data types. The data type can be built-in, custom or enumerated....
PreambleIf you are a Linux sysadmin or developer, there comes a time when you need to manage an Oracle database that can work in your environment.In this...
PreambleStarting with Microsoft SQL Server 2008, by default, the group of local administrators is no longer added to SQL Server administrators during the...