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Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now » Examples in Each Chapter
14 wrz 2009 · We now have to create a pdf file. I was planning on using pdfsharp/migradoc to do it, but then we'd have to create document and time its readiness with sql server data state and mail state. It'd be nice if the db could handle everything.
Standard SQL Functions Cheat Sheet. NUMERIC FUNCTIONS. BASIC OPERATIONS. Use +, -, *, / to do some basic math. To get the number of seconds in a week: SELECT 60 * 60 * 24 * 7; -- result: 604800. CASTING. From time to time, you need to change the type of a number. The . CAST() function is there to help you out. It lets you change the type of ...
12 wrz 2022 · Learn how to build conditional logic when writing SQL code using IF, BEGIN, END, ELSE, and ELSEIF logic.
1 cze 2021 · SELECT INITCAP('edgar frank ted cODD'); -- result: Edgar Frank Ted Codd. Get just a part of a string: SELECT SUBSTRING('LearnSQL.com', 9); -- result: .com. SELECT SUBSTRING('LearnSQL.com', 0, 6); -- result: Learn. Replace part of a string: SELECT REPLACE('LearnSQL.com', 'SQL', 'Python');
24 maj 2021 · The IF…ELSE structure will execute a certain block of code if a specified condition is TRUE, and a different block of code if that condition is FALSE. Here is the basic layout and syntax of the IF…ELSE structure: IF(<condition is true>) BEGIN. <execute some code>.
SQL Handwritten Notes Repository: A collection of PDF notes covering SQL concepts with concise definitions and examples. Explore fundamental commands, date/time functions, joins, and more. Contributions welcome!
