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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;
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
Here’s an example query:- SELECT * FROM users; user’s table. It would then return data like the below, which is typically called. If we were to replace the asterisk wildcard character (*) with specific column names instead, only the data from these columns would be returned from the query. SELECT first_name, last_name FROM users;
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.
12 wrz 2022 · Build Conditional SQL Server Logic - SQL IF, BEGIN, END, ELSE, ELSEIF. By: Eric Blinn | Updated: 2022-09-12 | Comments (3) | Related: > TSQL. Problem. I'm learning T-SQL and need to know how to use an IF statement to include conditional statements within a stored procedure, function, trigger, or script in Microsoft SQL Server. Solution.
10 sty 2012 · IF statements can, by definition, only take a single SQL statement. However, there is a special kind of SQL statement which can contain multiple SQL statements, the BEGIN-END block. If you omit the BEGIN-END block, your SQL will run fine, but it will only execute the first statement as part of the IF. Basically, this:
