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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 ...
This edition of SQL Practice Problems assumes that you have some basic background knowledge about relational databases and tables. However, I’ve added some beginner level questions to gradually introduce the various parts of the SQL Select statement for those with less experience in SQL.
26 gru 2023 · From Basic SQL Query Practice to Becoming an SQL Master. You have to start from somewhere. These 20 basic SQL query practices are ideal for building foundations before learning more advanced concepts. If you like learning SQL using hands-on exercises, then you’ve got to try LearnSQL.com.
22 paź 2024 · By tackling these problems, you'll solidify your understanding of advanced SQL concepts like joins, subqueries, functions, and window functions, ultimately boosting your ability to work with real-world data scenarios effectively.
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.
11 sie 2024 · Practice basic SQL queries in this article using the AdventureWorks sample database. These AdventureWorks exercises cover SELECT, JOIN, GROUP BY, aggregate functions, subqueries, CTEs, and more.
29 gru 2023 · Practice with solution of exercises on SQL SUBQUERIES using ANY, ALL, BETWEEN, IN, AND, EXISTS operator on HR database, and more from w3resource. w3resource Home
