How do you write if else condition in SQL query?
Any T-SQL statement can be executed conditionally using IF… ELSE. If the condition evaluates to True, then T-SQL statements followed by IF condition in SQL server will be executed. If the condition evaluates to False, then T-SQL statements followed by ELSE keyword will be executed.
Can we use nested if in MySQL?
Something I’ve rarely needed to use, but recently rediscovered is using nested inline MySQL IF statements in select queries to conditionally assign a value. If that doesn’t make sense, read on. It’s pretty simple.
What is CASE function in SQL?
The SQL CASE Statement The CASE statement goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.
How do I do an if statement in MySQL?
MySQL simple IF-THEN statement
- First, specify a condition to execute the code between the IF-THEN and END IF . If the condition evaluates to TRUE , the statements between IF-THEN and END IF will execute.
- Second, specify the code that will execute if the condition evaluates to TRUE .
How do I create an if statement in SQL query?
You can have two choices for this to actually implement:
- Using IIF, which got introduced from SQL Server 2012: SELECT IIF ( (Obsolete = ‘N’ OR InStock = ‘Y’), 1, 0) AS Saleable, * FROM Product.
- Using Select Case : SELECT CASE WHEN Obsolete = ‘N’ or InStock = ‘Y’ THEN 1 ELSE 0 END as Saleable, * FROM Product.
IS NOT NULL in MySQL?
The NOT NULL constraint enforces a column to NOT accept NULL values. This enforces a field to always contain a value, which means that you cannot insert a new record, or update a record without adding a value to this field.
How to write a MySQL if else endif statement?
MySQL IF ELSE statement implements a basic conditional construct when the expression evaluates to false. Its syntax is as follows −. IF expression THEN statements; ELSE else-statements; END IF; The statements must end with a semicolon. To demonstrate the use of IF ELSE statement within MySQL stored procedure, we are creating the following
How to write nested IF ELSE if in MySQL?
MySQL MySQLi Database. MySQL IF ELSE statement implements a basic conditional construct when the expression evaluates to false. Its syntax is as follows −. IF expression THEN statements; ELSE else-statements; END IF; The statements must end with a semicolon. To demonstrate the use of IF ELSE statement within MySQL stored procedure, we are
How to ‘insert if not exists’ in MySQL?
Using the INSERT IGNORE statement
What does IF THEN ELSE statement mean?
If-then-else. meaning. (0) Meanings. A high-level programming language statement that compares two or more sets of data and tests the results. If the results are true, the THEN instructions are taken; if not, the ELSE instructions are taken.