For example; Create Procedure Test Variable VARCHAR(10) AS If Variable = Whatever Nesting IF's in Stored Proc - Microsoft SQL / MS SQL Server Often I create a stored procedure I refer to as a switching yard. You can use indentation to make nested flow-control blocks more easily readable by humans (although this is not required by MySQL… Its only purpose is to give an application one Sp to execute. In this article, we will talk about IF and Else control structure which will work inside the procedure and how an if function, which will even work in the simple query too, explained below. You should think carefully about the readability of your statements—sometimes a nested set of IF or CASE statements will be more readable and possibly more efficient. The PRINT 'x > 0 and x < y'; statement in the IF branch executes. Therefore, the nested IF statement executes. We can also use another approach allowing the inner procedures to open transactions without checking if there are open transactions. 1. The MySQL stored program language uses three-valued logic; just because a statement is NOT TRUE does not mean that it is necessary FALSE—it could be NULL. Is this not possible in a stored procedure? Now what I'm attempting to do is update another table (stockDataStats) that get it's results from the stored procedure I'm trying create: CREATE TABLE stockDataStats(stockSymbol VARCHAR(10) PRIMARY KEY, AvgBid DOUBLE, AvgAsk DOUBLE, AvgLast DOUBLE, AvgVolume DOUBLE) If that doesn't make sense, read on. Because @y is set to 20, the condition (@x < @y) evaluates to true. IF ( @count = 1 ) (SELECT skumaster.sku AS SKU, ( skumaster.minimumstock - Count(*) ) AS ReorderQuantity, 'LowInventory' AS Description FROM skumaster skuMaster JOIN inventorymaster inventoryMaster ON skumaster.sku = … Each IF must be terminated by its own END IF followed by a semicolon. It's pretty simple. In this Stored procedure (called by this inventory-checking function), many if else if statement are used.How can it be improved? Here is the output: A Simple Nested Stored Procedure. I'm having trouble figuring out how to loop through a table within a stored procedure and use the results as a parameter into another stored procedure that inserts the parameter. I'm inserting real-time data throughout the day in stockData table. IF and ELSE control structure. In this case we must also issue a ROLLBACK only in the procedure where the outermost transaction is opened, but if @@TRANCOUNT>1 in the inner procedure we need to issue a COMMIT even in case of failure to end the procedure with the same value of … END IF blocks may be nested within other flow-control constructs, including other IF statements. 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. ; Then, set value for the OUT parameter pCustomerLevel to PLATINUM if the credit limit of the customer is greater than 50,000. We can use If and else control structure in two ways in MySQL. MySQL IF() Function String Value Example MySQL IF() Function Number Value Example MySQL Stored Procedure Function: Making hello world Function using aliase Example MySQL Stored Procedure: Creating Table using Stored Procedure Example Parentheses in SQL Command MySQL Example Aliase column name in SQL Command MySQL Example If and Else control structure works only inside of a procedure. Finally, the nested IF statement check if @x is less than @y ( @x < @y). Example: CREATE PROCEDURE GetColumnData() The stored procedure GetCustomerLevel() accepts two parameters: pCustomerNumber and pCustomerLevel.. 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