This can be done using JOIN methods, or you can use a second SELECT statement inside your main SELECT query-a subquery. To retrieve information from more than one table, you need to join those tables together. multiple rows as a single row, PostgreSQL can only execute the query if it can. We can use ‘AS’ for alias or used to assign temporarily a new name to a table column.įor example : SELECT empno as employee_id, ename as employee_name, job as job_title The IN operator can work like an comparison between a number of values. To retrieve specific information from a single table, we can simply define the specific column names and apply conditions for the table : To retrieve all the information from single table you can use the following format : Retrieving methods from database From a single table
Note: You can get sample table structures along with data which is used in throughout the article from the link below:
: optional parameters used for any further restrictions on the data. : the tables from which to retrieve the data. : specifies the column names that need to be retrieved from that particular table or tables. The SELECT statement can be divided into three main parts: To retrieve data from any specific table, we have to use the SELECT statement. Data can be stored in the following hierarchy : PostgreSQL is based on the Relational Database Management System (RDBMS).
#Postgresql like multiple values how to
SUMMARY: This article covers the SELECT statement in PostgreSQL and how to use it to query data from single and multiple tables:
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