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7 Δεκ 2013 · How do I write an IF ELSE statement in a MySQL query? Something like this: mysql_query("...(irrelevant code).. IF(action==2&&state==0){state=1}"); Then down in my array I should be able to do this: $row['state'] . //this should equal 1, the query should not change anything in the database, . //just the variable for returning the information. mysql.
11 Ιουλ 2014 · If your table has an auto-incrementing primary key, you can use REPLACE INTO ... VALUES. If the select statement returns NULL, then a new row is inserted. Otherwise, if a row is found, it will update the row with key @id.
21 Αυγ 2024 · Definition. The IF-THEN statement is used to execute a set of SQL statements based upon a pre-defined condition. When the condition checks to be TRUE, the statements between IF-THEN and ELSE execute. On the other hand, the statements (else-statements) between the ELSE and END IF execute.
Use IF...THEN...ELSEIF...ELSE statement to evaluate multiple conditions sequentially and execute corresponding blocks of statements based on the first true condition, with an optional block of statements to execute if none of the conditions is true.
Definition and Usage. The IF () function returns a value if a condition is TRUE, or another value if a condition is FALSE. Syntax. IF (condition, value_if_true, value_if_false) Parameter Values. Technical Details. More Examples. Example. Return 5 if the condition is TRUE, or 10 if the condition is FALSE: SELECT IF(500<1000, 5, 10);
30 Αυγ 2024 · In a conditional statement, you’ll specify a condition (that’s the IF), what happens if the condition is met (THEN), and what happens if it’s not (ELSE). So the normal VBA IF statement is actually an IF THEN ELSE statement. Let’s take a look at how you put these clauses together in the VBA code.
1 Ιουν 2022 · MySQL IF-THEN-ELSE statement. To execute statements when a condition in the IF block does not evaluate to true, you can use IF-THEN-ELSE. The syntax looks as follows: IF condition THEN statements; ELSE else-statements; END IF; If a specified condition is: true – statements between IF-THEN and ELSE will be executed; false – statements ...
