Search results
Standard SQL Functions Cheat Sheet. CASE WHEN. The basic version of . CASE WHEN. checks if the values are equal (e.g., if. fee is equal to 50, then 'normal' is returned). If there isn't a matching value in the CASE WHEN, then the ELSE value will be returned (e.g., if fee is equal to 49, then 'not available' will show up. SELECT CASE fee WHEN 50 ...
2 wrz 2024 · In this guide, we will see a comprehensive cheat sheet for essential SQL operations, offering a practical reference for tasks ranging from database creation to advanced data handling techniques.
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)
25 cze 2024 · This SQL cheat sheet provides you with the necessary concepts required to start on with SQL. It is helpful for beginners willing to learn and work on SQL. SQL BASICS. SQL: Structured query language (SQL) is a domain specific language used for programming and querying a database. Datatypes for SQL:
SQL CHEAT SHEET SUBQUERIES You can run SQL queries within SQL queries. (Called subqueries.) Even queries within queries within queries. The point is to use the result of one query as an input value of another query. Example: SELECT COUNT(*) FROM (SELECT column1, COUNT(column2) AS inner_number_of_values FROM table_name GROUP BY column1) AS inner ...
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 · Fetch all names that start with any letter followed by 'atherine': SELECT name FROM names WHERE name LIKE '_atherine'; Fetch all names that end with 'a': SELECT name FROM names WHERE name LIKE '%a'; USEFUL FUNCTIONS. Get the count of characters in a string: SELECT LENGTH('LearnSQL.com');-- result: 12 Convert all letters to lowercase: SELECT ...
