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15 wrz 2008 · If you need to write just one condition, then iif() is sufficient, however if you want to write multiple iif() conditions within one statement then you will have to use `case' statement as demonstrated in above responses. Here is an example for your reference.
SELECT CASE WHEN ColB = 'March' THEN (Select ColA FROM tablename WHERE ColB = 'January') END FROM tablename Or can be done without a CASE would be SELECT (SELECT colA FROM tablename WHERE colB = 'January') FROM tablename WHERE colB = 'March'
28 maj 2024 · We can use either a CASE statement or an IIF() function to implement IF-THEN logic in SQL. In this tutorial, we’ll explore how to implement IF-THEN logic in SQL across various dialects such as SQL Server, MySQL, and PostgreSQL.
1 mar 2021 · In this article, we explored the SUBSTRING, PATINDEX, and CHARINDEX string functions for SQL queries. You can retrieve a specific text, data using a combination of these functions. As a beginner, you can first write these functions individually and later combine the functions.
You can take advantage of various functions inside the CATCH block to get detailed information about an error. These functions include the following: ERROR_MESSAGE() - you can take advantage of this function to get the complete error message. ERROR_LINE() - this function can be used to get the line number on which the error occurred.
13 kwi 2017 · In this post, I’ll help you get started by explaining five common string functions in SQL. SQL String Functions: CONCAT. CONCAT(first_char, second_char, ... n_char) The CONCAT SQL string function combines two or more strings into one string. All entry_char inputs need to be CHAR, VARCHAR, or NCHAR data types.
The IF statement can have THEN, ELSE, and ELSEIF clauses, and it is terminated with END IF. If a given search_condition evaluates to true, the corresponding THEN or ELSEIF clause statement_list executes. If no search_condition matches, the ELSE clause statement_list executes.
