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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! Happy studying and coding!
19 sie 2013 · Here is the code: ALTER FUNCTION [dbo].[fnTally] (@SchoolId nvarchar(50)) RETURNS int AS BEGIN DECLARE @Final nvarchar IF EXISTS ( SELECT question, yes_ans, no_ans, na_ans, blank_ans FROM dbo.qrc_maintally WHERE school_id = @SchoolId ) IF yes_ans > no_ans AND yes_ans > na_ans BEGIN SET @Final = 'Yes' END ELSE IF no_ans > yes_ans AND no_ans > na ...
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
17 sie 2023 · We’ll soon show you 20 basic SQL query examples to start talking with the database. All these queries are taught in our SQL Basics course. This course will give you even more structure, examples, and challenges to solve.
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 ...
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> END ELSE BEGIN <execute some different code> END
12 wrz 2022 · Learn how to build conditional logic when writing SQL code using IF, BEGIN, END, ELSE, and ELSEIF logic.
