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23. Mai 2023 · Within a SELECT statement, a simple CASE expression allows for only an equality check; no other comparisons are made. The following example uses the CASE expression to change the display of product line categories to make them more understandable.
7. Mai 2017 · CASE: The Simple Format. The simple CASE compares a value to one or more WHEN conditions. If it meets a WHEN condition, the THEN result is returned. Here's what the syntax looks like: CASE column_or_expression WHEN value THEN when_result... ELSE else_result END In a simple CASE expression, the name of the column or expression to be ...
The SQL CASE Expression. The CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.
The SQL CASE expression allows you to evaluate a list of conditions and returns one of the possible results. The CASE expression has two formats: simple CASE and searched CASE. You can use the CASE expression in a clause or statement that allows a valid expression.
7. Aug. 2008 · 7 Answers. Sorted by: 82. The complete syntax depends on the database engine you're working with: For SQL Server: CASE case-expression. WHEN when-expression-1 THEN value-1. [ WHEN when-expression-n THEN value-n ... [ ELSE else-value ] END. or: CASE. WHEN boolean-when-expression-1 THEN value-1. [ WHEN boolean-when-expression-n THEN value-n ...
- The complete syntax depends on the database engine you're working with: For SQL Server: CASE case-expression WHEN when-expression-1 THEN valu...
- Considering you tagged multiple products, I'd say the full correct syntax would be the one found in the ISO/ANSI SQL-92 standard:
- Here are the CASE statement examples from the PostgreSQL docs (Postgres follows the SQL standard here): SELECT a, CASE WHEN a=1 THEN 'one'...
- Sybase has the same case syntax as SQL Server: Description. Supports conditional SQL expressions; can be used anywhere a value expression can be...
- I dug up the Oracle page for the same and it looks like this is the same syntax, just described slightly different. Link: Oracle/PLSQL: Case State...
- Oracle syntax from the 11g Documentation: CASE { simple_case_expression | searched_case_expression } [ else_clause ] END. simple_case_e...
17. Aug. 2021 · Let’s look at a practical example of a simple CASE statement. Here is the order_summary table: Now say you are analyst in an ecommerce firm. You want to analyze orders based on their order value and divide them into buckets ( very low, low, medium, high, and very high) according to their order value.
2. Juni 2023 · The CASE statement allows you to perform an IF-THEN-ELSE check within an SQL statement. It’s good for displaying a value in the SELECT query based on logic that you have defined. As the data for columns can vary from row to row, using a CASE SQL expression can help make your data more readable and useful to the user or to the application.
