Jan 2, 2025 · The IF...ELSE statement in SQL allows conditional execution of queries or operations based on specific conditions. It evaluates a condition and executes one block of code if the condition is TRUE and another block if the condition is FALSE .

Sep 15, 2008 · Use a CASE statement: SELECT CASE WHEN (Obsolete = 'N' OR InStock = 'Y') THEN 'Y' ELSE 'N' END as Available etc...

Mar 26, 2025 · Let’s look at the syntax for a CASE statement: SELECT column1, column2, CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 ELSE result_default END AS alias_name FROM table_name; Here, we use a SELECT and FROM query to select multiple columns from a table and use a CASE statement to evaluate conditions. 2.2. Example Query

Jul 2, 2010 · Based on my condition,(for eg. length), I want to execute different SQL statement. Problematic sample query is as follows: select case when char_length('19480821') = 8 then select count(1) from Patient when char_length('19480821')=10 then select count(1) from Doctor end

Dec 8, 2014 · You can use simply if statement under select query as like I have described below . if(some_condition,if_satisfied,not_satisfied) SELECT IF(IDParent < 1,ID,IDParent) FROM yourTable ;

This SQL tutorial explains how to use the AND condition and the OR condition together in a single query with syntax and examples. The SQL AND condition and OR condition can be combined to test for multiple conditions in a SELECT, INSERT, UPDATE, or DELETE statement.

Dec 7, 2023 · If you want to do if-else-then logic in select, where or anywhere else in a statement, you need a case expression. This is a series of when clauses that the database runs in order: For example, if you want to map exam correct percentages to grade letters according to these rules:

Nov 22, 2024 · Imposes conditions on the execution of a Transact-SQL statement. The Transact-SQL statement that follows an IF keyword and its condition is executed if the condition is satisfied: the Boolean expression returns TRUE.

Mar 26, 2025 · Syntax of the CASE statement. The CASE statement in SQL follows a straightforward structure that resembles conditional statements in programming languages.. It can be implemented in two ways, depending on how conditions are evaluated: Simple CASE. The simple CASE syntax compares an expression to a set of simple expressions sequentially and returns the result of the first match.

Apr 17, 2025 · With the select command in SQL, users can access data and retrieve specific records based on various conditions, making it an essential tool for managing and analyzing data. In this article, we’ll learn the SQL SELECT statement syntax, show you SQL query examples, and explore advanced techniques to help you use SELECT queries for data ...