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I want to implement ternary conditional operator in MySQL. I have a table in which one field id exist. Its value may be null. I want to display id in ternary conditional format like this:
select id = id == null ? 0 : id; Is it possible in MySQL?
776
(yourCondition) ? statement1:statement2; In the above syntax, if yourCondition becomes true then statement1 will evaluate and if yourCondition becomes false then statement2 will evaluate.
SELECT (CASE WHEN (condition 1 exp) THEN ( true statement ) WHEN (condition2 exp) THEN ( true statement ) ELSE( false statement ) END) AS "Conditional_ex" FROM table; It evaluates the condition statement and executes first result and the remaining where clause is not executed.
The conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark ( ? ), then an expression to execute if the condition is truthy followed by a colon ( : ), and finally the expression to execute if the condition is falsy.
not equal to (<>, !=) operator. MySQL Not equal is used to return a set of rows (from a table) after making sure that two expressions placed on either side of the NOT EQUAL TO (<>) operator are not equal. Syntax: <>, !=
Try this :
select if(Id is null, 0, id) as Id; The documentation is your friend; you should read it!
It says:
IFNULL(expr1,expr2)If
expr1is notNULL,IFNULL()returnsexpr1; otherwise it returnsexpr2.
And then lots of examples. This is equivalent to using a ternary conditional with a comparison to NULL and the comparison subject as the second operand; that it doesn't happen to use the symbols ? and : to get you there is not really relevant to anything.
So, in your case:
SELECT IFNULL(`id`, 0) FROM `table` If you're desperate to provide three operands explicitly (why?!), then switch to IF:
SELECT IF(`id` IS NULL, 0, `id`) FROM `table` If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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