Please note that the filter predicate uses the equal (=) sign and the exact phrase to be matched in the department column from the users' table. SELECT * FROM users WHERE department = ‘Computer Science’ For example, if we would want to select users that work in the Computer Science department, then we would write the SQL query as follows. As such, SQL offers a filter predicate “WHERE” using which users can filter the query and select the results that only match the filter predicate. Additional or unnecessary data adds to bandwidth and decreases the performance of the queries. PostgreSQL also supports native ANSI SQL queries, and it is quite easy for a beginner to get started with writing queries for a PostgreSQL database.Īn important aspect of writing queries is that users should be able to filter and select data that is required to be accessed by the system. An important skill to master while working with any database of choice would be to learn and write SQL queries. PostgreSQL is fast and easily available to be installed on-premises or on popular cloud platforms such as Azure, AWS, etc. PostgreSQL is an open-source relational database management system that has gained a lot of popularity in recent days. In this article, I am going to talk about pattern matching and regular expressions in PostgreSQL.
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