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The SQL cheat sheet provides you with the most commonly used SQL statements for your reference. You can download the SQL cheat sheet as follows: Download 3-page SQL cheat sheet in PDF format. Querying data from a table. Query data in columns c1, c2 from a table. SELECT c1, c2 FROM t; Code language: SQL (Structured Query Language) (sql)
SQL CHEAT SHEET A few examples: SELECT * FROM table_name WHERE column1 != 'expression'; This query returns every column from table_name, but only those rows where the value in column1 is NOT 'expression'. SELECT * FROM table_name WHERE column2 >= 10; It returns every column from table_name, but only those rows where the value in
Whether you need a quick reference for major SQL concepts before an interview, or you want to level-up your existing SQL skills, our SQL cheat sheet is the ideal starting point. Plus, we’ve broken it down into 11 essential SQL topics to help you get the most from this SQL query cheat sheet.
SELECT columns FROM table1 FULL OUTER JOIN table2 ON table1.column_name = table2.column_name; Understanding these joins and their differences is key to manipulating and retrieving data effectively in SQL. Each join type serves a specific purpose and can be used in different scenarios to achieve the desired data set.
Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now » Examples in Each Chapter
Adds a new column to an existing table. Example: Adds a new column named ‘email_address’ to a table named ‘users’. ALTER TABLE users ADD email_address varchar(255); ADD CONSTRAINT It creates a new constraint on an existing table, which is used to specify rules for any data in the table.
Learn and remember key functions and concepts of SQL & Databases with this handy quick reference guide (+ PDF) to the fundamentals of SQL.
