SQL CASE Examples The following SQL goes through conditions and returns a value when the first condition is met: ExampleGet your own SQL Server SELECTOrderID, Quantity, CASE WHENQuantity >30THEN'The quantity is
NULLIF Function NULLIF returns NULL if its two arguments are equal, otherwise, it returns the first argument: SELECT NULLIF(column, 'value_to_compare') FROM table_name; It can serve as a simpler alternative to CASE in some scenarios. Conclusion The CASE expression is an indispensable tool in...
DECODE is considered the most powerful function in Oracle. Oracle 8i release introduced the CASE expression. The CASE expression can do all that DECODE does plus lot of other things including IF-THEN analysis, use of any comparison operator and checking multiple conditions, all in a SQL query i...
下面的示例在 ORDER BY 子句中使用 CASE 表达式,以根据给定的列值确定行的排序顺序。 The following examples uses the CASE expression in an ORDER BY clause to determine the sort order of the rows based on a given column value. 在第一个示例中,会计算 SalariedFlag 表中 HumanResources.Employee 列的...
or a customer. The function returns the first and last name of a givenBusinessEntityIDand the contact type for that person. TheCASEexpression in the SET statement determines the value to display for the columnContactTypebased on the existence of theBusinessEntityIDcolumn in theEmployee,Vendor, ...
Note that we used theROUND()function to round the discount to two decimal places. Searched CASE expression# The Oracle searchedCASEexpression evaluates a list of Boolean expressions to determine the result. Here’s the basic syntax of the searchedCASEstatement: ...
The CASE expression in the SET statement determines the value to display for the column ContactType based on the existence of the BusinessEntityID column in the Employee, Vendor, or Customer tables.SQL Kopiraj USE AdventureWorks2022; GO CREATE FUNCTION dbo.GetContactInformation (@BusinessEntityID...
ExamplesSQL Tutorial, FunctionsExplanationCASE checks the search conditions (search_condition) in succession. As soon as a search condition that is true is found, the result of the general CASE function is the value of the expression result_expression that belongs to the search condition. ...
Examples See Also Applies to: SQL Server This function converts each character in $arg to its upper case equivalent. The Microsoft Windows binary case conversion for Unicode code points specifies how characters are converted to upper case. This standard is different than the mapping for Unicode...
Every character that does not have an uppercase correspondent is included in the returned value in its original form. If source-string is the empty sequence, the returned value is a string of length zero. Examples The following function converts the string 'Test literal 1' to uppercase. ...