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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.
25 sie 2021 · This comprehensive cheat sheet is packed with syntax for different text and numeric functions, CASE WHEN statements, handling NULL, date and time types, INTERVAL s, and aggregate functions. It also features a troubleshooting section to help you navigate through common issues seamlessly. Download Options:
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.
28 lip 2017 · Let's start with a header of procedure or function we are documenting. Standard Header. There is not really something like a standard header, there are a few templates but they really boil down to basically the same. Let's have a look at SQL Server Management Studio standard header:
SQL statements are the means by which programs and users access data in an Oracle database. The sections that follow show each SQL statement and its related syntax.
created by Tomi Mester. I originally created this cheat sheet for my SQL course and workshop participants.* But I have decided to open-source it and make it available for everyone who wants to learn SQL. It's designed to give you a meaningful structure but also to let you add your own notes (that's why the empty boxes are there).
