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15 wrz 2008 · Once you figure out how it works, you can convert three results to two results by deciding the behavior of null. E.g. this would treat null as not saleable: SELECT CASE WHEN obsolete = 'N' OR instock = 'Y' THEN 'true' ELSE 'false' -- either false or null END AS saleable. Share.
28 maj 2024 · In this article, we explored different options for executing IF-THEN logic in a SQL SELECT statement. These options include using CASE , IIF() , and CHOOSE() . Furthermore, if we want a query that’s used in almost every dialect, we must choose the CASE statement.
The CASE WHEN statement provides if then else logic within SQL. It's used for conditional expressions. Example usage: SELECT CASE WHEN condition THEN result ELSE alternative END FROM table_name
WHEN SELECT[comparison_1] THEN [value_1] WHEN [comparison_2] THEN [value_2] ELSE [value_3] END AS [new_column_name] Using if/then logic in SQL with CASE: WITH track_info AS (SELECT t.name, ar.name artist, al.title album_name, FROM track t INNER JOIN album al ON al.album_id = t.album_id INNER JOIN artist ar ON ar.artist_id = al.artist_id) SELECT ...
23 lis 2012 · select if(column_name = "value", "value_1", "value_2") as column_name from table_name; or. select (case when column_name = "value" then 'value_1' else 'value_2' end) as column_name from table_name;
25 sie 2021 · This comprehensive cheat sheet is packed with syntax for different text and numeric functions, CASE WHEN statements, handling NULL, date and time types, INTERVAL s, and aggregate functions. It also features a troubleshooting section to help you navigate through common issues seamlessly. Download Options:
SELECT. Fetch the id and name columns from the product table: SELECT id, name FROM product; Concatenate the name and the description to fetch the full description of the products: SELECT name || ' - ' || description FROM product; Fetch names of products with prices above 15:
