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1 cze 2021 · Get the count of characters in a string: SELECT LENGTH('LearnSQL.com'); -- result: 12. Convert all letters to lowercase: SELECT LOWER('LEARNSQL.COM'); -- result: learnsql.com. Convert all letters to uppercase: SELECT UPPER('LearnSQL.com'); -- result: LEARNSQL.COM.
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)
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.
1 cze 2021 · Get the count of characters in a string: SELECT LENGTH('LearnSQL.com'); -- result: 12. Convert all letters to lowercase: SELECT LOWER('LEARNSQL.COM'); -- result: learnsql.com. Convert all letters to uppercase: SELECT UPPER('LearnSQL.com'); -- result: LEARNSQL.COM.
4 wrz 2023 · This cheat sheet is a comprehensive guide to SQL Server, offering a quick reference to its essential commands. It covers the basics of creating and displaying databases and tables, the commands to modify tables, and the fundamental syntax for T-SQL commands such as SELECT, INSERT, UPDATE, and DELETE.
3 dni temu · In SQL, we use the following types of commands: DDL (Data Definition Language): DDL commands are used to define the frame of a database, and these are CREATE, ALTER, and DROP. DML (Data Manipulation Language): DML commands are used to modify or edit the existing database, and these are INSERT, UPDATE, and DELETE.
SELECT DISTINCT. column FROM table; WHERE column LIKE 'text'; (or NOT LIKE) WHERE column condition1 AND column condit‐ion2; WHERE column condition1 OR column condit‐ion2; WHERE column BETWEEN 'A' AND 'B'; Operator used in a WHERE clause to filter the result set within a certain range (numbers, text, or dates).
