How to use if and else in PostgreSQL?

How to use if and else in PostgreSQL?

Therefore, to handle the false conditions, the else statement is used in Postgres. if condition then statements/commands; else alternate-statements/commands; END if; The syntax illustrates that the statements/commands affiliated with the if statement will execute only if the given condition/expression is true.

Can I use if in PostgreSQL?

In PostgreSQL, the if-statement is one of the most valuable and frequently used control statements. The If statement executes only those expressions that satisfy the specified condition.

What is the use of if condition in PostgreSQL?

Use the if then to execute statements when a condition is true . Use the if then else to execute statements when a condition is true and execute other statements when the condition is false . Use the if then elsif to evaluate multiple conditions and execute statements when the corresponding condition is true .

How to check multiple conditions in if statement in PostgreSQL?

In Postgres, the IF and IF-THEN-ELSE statements evaluate only one condition; however, the IF-THEN-ELSIF statement evaluates several conditions.

Can you write if else in SQL?

The IF ELSE statement controls the flow of execution in SQL Server. It can be used in stored-procedures, functions, triggers, etc. to execute the SQL statements based on the specified conditions.

Can we use if then else in SQL?

This is most easily accomplished in all versions of SQL Server using the CASE statement, which acts as a logical IF… THEN…ELSE expression and returns various values depending on the result.

Can you use if in a query?

In this tutorial, we looked at different ways we can use the IF function as part of the MySQL queries. We also learned to use multiple IF functions within a single query in combination with aggregate functions like COUNT, which could return output depending on the condition specified in the IF function.

How to use multiple and condition in PostgreSQL?

SELECT column1, column2, columnN FROM table_name WHERE [condition1] AND [condition2]… AND [conditionN]; You can combine N number of conditions using AND operator. For an action to be taken by the PostgreSQL statement, whether it be a transaction or query, all conditions separated by the AND must be TRUE.

Can we use IF condition in SQL query?

IF statements can be used to conditionally enter into some logic based on the status of a condition being satisfied. The IF statement is logically equivalent to a CASE statements with a searched-case-statement-when clause.

Can an if statement have multiple conditions?

How to use IF function with multiple conditions. In essence, there are two types of the IF formula with multiple criteria based on the AND / OR logic. Consequently, in the logical test of your IF formula, you should use one of these functions: AND function – returns TRUE if all the conditions are met; FALSE otherwise.

What is the alternative to IF ELSE in SQL?

SQL Server CASE statement is equivalent to the IF-THEN statement in Excel. The CASE statement is used to implement the logic where you want to set the value of one column depending upon the values in other columns. The SQL Server CASE Statement consists of at least one pair of WHEN and THEN statements.

Can you do conditionals in SQL?

Conditional statements are used to define what logic is to be executed based on the status of some condition being satisfied. There are two types of conditional statements supported in SQL procedures: CASE.

Can I use IF ELSE in MySQL?

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 .

How to use IF ELSE in SQL query?

The Transact-SQL statement that follows an IF keyword and its condition is executed if the condition is satisfied: the Boolean expression returns TRUE. The optional ELSE keyword introduces another Transact-SQL statement that is executed when the IF condition is not satisfied: the Boolean expression returns FALSE.

Can I use if condition in SQL query?

IF statements can be used to conditionally enter into some logic based on the status of a condition being satisfied. The IF statement is logically equivalent to a CASE statements with a searched-case-statement-when clause.

How to use 2 conditions in WHERE clause in SQL?

The OR operator is used to combine multiple conditions in an SQL statement's WHERE clause. It returns true if at least one of the conditions is true, and false if all conditions are false.

How do you combine conditions in PostgreSQL?

The PostgreSQL AND and OR operators are used to combine multiple conditions to narrow down selected data in a PostgreSQL statement. These two operators are called conjunctive operators. These operators provide a means to make multiple comparisons with different operators in the same PostgreSQL statement.

How do you write an IF ELSE condition in SQL?

The following are the syntax that illustrates the use of the IF ELSE statement in SQL Server:

1. IF expression.
2. BEGIN.
3. Statement block — It executes when the IF clause expression is TRUE.
4. END.
5. ELSE.
6. BEGIN.
7. Statement block — It executes when the IF clause expression is FALSE.
8. END.