The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By, and Group By clause. It can be used in the Insert statement as well.
In the T-SQL scripting language, you can use the SQL CASE statement to evaluate a condition and return one or more result expressions. This SQL Tutorial will teach you when and how you can use CASE in T-SQL statements. Solution TheCASE expressionis used to build IF … THEN … ELSE stat...
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Simple SQL CASE Example Here is the syntax for the SQLCASEexpression: CASE WHENcondition_1THENresult_1 WHENcondition_2THENresult_2 ELSEelse_result END In this syntax, SQLCASEmatches the value with eithercondition_1orcondition_2. If a match is found, the statement will return the corresponding...
SQL中的Case语句和OR SQL - CASE语句- Count语句和case函数 错误的CASE SQL语句 Case语句的硬编码结果的嵌套case OR中的CASE语句与SQL中的AND 在SQL Server中执行嵌套case语句逻辑的最佳方法 WHERE语句中的嵌套CASE Select Case in SQL语句 页面内容是否对你有帮助?
CASE selector WHEN selector_value_1 THEN statements_1 WHEN selector_value_1 THEN statement_2 ... ELSE else_statements END CASE;Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) Let’s examine the syntax of the simple CASE statement in detail: 1) selector The selector is an ...
SQL CASE The SQLCASEstatement evaluates a list of conditions and adds a column with values based on the condition. For example, -- add a new column 'order_volume' in the Orders table-- and flag any order greater than 10000 as 'Large Order'-- and smaller than 10000 as 'Small Order'...
SQL: CASE Statement 1.CASE 写法如下: CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 WHEN conditionN THEN resultN ELSE result END; 解释:1)先匹配第一条,不匹配的话继续第二条,如此循环,
SQL SELECTBusinessEntityID, LastName, TerritoryName, CountryRegionNameFROMSales.vSalesPersonWHERETerritoryNameISNOTNULLORDERBYCASECountryRegionNameWHEN'United States'THENTerritoryNameELSECountryRegionNameEND; GO D. Use CASE in an UPDATE statement
SQL SELECTBusinessEntityID, LastName, TerritoryName, CountryRegionNameFROMSales.vSalesPersonWHERETerritoryNameISNOTNULLORDERBYCASECountryRegionNameWHEN'United States'THENTerritoryNameELSECountryRegionNameEND; GO D. Use CASE in an UPDATE statement