Souy Soeng

PostgreSQL Joins In PostgreSQL, joins are used to combine rows from two or more tables based on a related column between them. There are several typ…

PostgreSQL INNER JOIN An INNER JOIN is used to retrieve data from two tables where there is a match between the specified columns in both tables. O…

PostgreSQL LEFT JOIN A LEFT JOIN (or LEFT OUTER JOIN ) is used to return all rows from the left table (the first table in the join), and the matche…

PostgreSQL SELECT DISTINCT The SELECT DISTINCT statement in PostgreSQL is used to return unique (non-duplicate) values from a column or a set of co…

PostgreSQL WHERE Clause The WHERE clause in PostgreSQL is used to filter records from a table based on a specified condition. It is one of the mos…

PostgreSQL Sample Database A sample database is useful for testing queries, learning SQL, and developing applications. Below, you'll find a step…

PostgreSQL LENGTH Function The LENGTH function in PostgreSQL is used to determine the number of characters or bytes in a string. It is commonly us…

PostgreSQL CREATE TABLE Statement The CREATE TABLE statement in PostgreSQL is used to define a new table in a database. You must specify the table…

How to Connect to a PostgreSQL Database Server You can connect to a PostgreSQL database using various methods: psql (Command Line) pgAdmin (Graphica…