Viewed 3k times. I have a huge query used within a case-when block. Richard k 21 21 gold badges silver badges bronze badges. NoName NoName 4 4 silver badges 19 19 bronze badges. Add a comment. Active Oldest Votes. Gordon Linoff Gordon Linoff 1. Slava Rozhnev 7, 6 6 gold badges 20 20 silver badges 35 35 bronze badges.
Chhaya Sethi Chhaya Sethi 1. It returns the result expression r of the first Boolean expression e that evaluates to true. In other words, Oracle evaluates each Boolean condition to determine whether it is true, and never evaluates the next condition if the previous one is true.
The following example uses the searched CASE expression to classify the products based on their list prices:. In this example, the result set is sorted by the column state when the country is the US and by the column city for all other countries. RegionID, dbo. DistrictID, dbo. DistrictName, dbo. Add a comment. Active Oldest Votes. Another probably more simple option would be: IIf [table3. EUID, dbo. Mosty Mostacho Mosty Mostacho Just to clarify, the initial query was written in Access, but the tables have since been exported to SQL Server , so I'm trying to create the equivalent of the query in SQL — ivorytux.
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Sign up using Facebook. Expressions must be of the same data type, There is no implicit conversion performed. The coalesce function returns the first non-NULL value of the expressions in the list. The list must consist of at least 2 values.
When a column in a table is defined there is the possibility to have a default value for this column whenever it is inserted without a value.
This is done on insert only. If you modify the default during the life of the table, the new default will be applied from that moment on. Now how do you make sure a default is applied to columns already NULL?
It can for instance be used to build a decision table. Consider the following decision table:. The column in our table just holds the code instead of the value. If we want to represent the value instead of the code we could write a query like this:. The case statement has two flavors. The simple case and the searched case.
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