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1 cze 2021 · Standard SQL Functions Cheat Sheet. TEXT FUNCTIONS. CONCATENATION. Use the || operator to concatenate two strings: SELECT 'Hi ' || 'there!'; -- result: Hi there! Remember that you can concatenate only character strings using. ||. Use this trick for numbers: SELECT '' || 4 || 2;
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 ...
1 cze 2021 · Standard SQL Functions Cheat Sheet. TEXT FUNCTIONS. CONCATENATION. Use the || operator to concatenate two strings: SELECT 'Hi ' || 'there!'; -- result: Hi there! Remember that you can concatenate only character strings using. ||. Use this trick for numbers: SELECT '' || 4 || 2; -- result: 42.
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.
It starts from the absolute basics (SELECT * FROM table_name;) and guides you to the intermediate level (JOIN, HAVING, subqueries). I added everything that you will need as a data analyst/ scientist. The ideal use case of this cheat sheet is that you print it in color and keep it next to you while you are learning and practicing SQL on your ...
SQL Intermediate: Joins & Complex Queries. Many of these examples use table and column names from the real SQL databases that learners work with in our interactive SQL courses. For more information, sign up for a free account and try one out! Joining data in SQL: Joining tables with INNER JOIN:
25 mar 2021 · This ultimate SQL Cheatsheet has been created to help you understand SQL as quickly as possible. It also contains the most commonly used SQL Keywords and commands that you would need. You can read this tutorial or download the SQL Cheat Sheet pdf for offline use. You can also edit PDF online.
