Here, theCASEstatement checks if theamountis greater than or equal to400. If this condition is satisfied, a new columnoffer_pricewill contain the values equal toamount - amount * 10/100. CASE With Multiple Conditions It is also possible to stack multiple conditions inside a singleCASEclause. ...
sql case statement
2.举例: SELECTOrderID, Quantity,CASEWHENQuantity>30THEN'The quantity is greater than 30'WHENQuantity=30THEN'The quantity is 30'ELSE'The quantity is under 30'ENDASQuantityTextFROMOrderDetails; SELECTCustomerName, City, CountryFROMCustomersORDERBY(CASEWHENCityISNULLTHENCountryELSECityEND); 以上例子等...
CASE WHEN condition_1 THEN statements_1 WHEN condition_2 THEN statements_2 ... WHEN condition_n THEN statements_n [ ELSE else_statements ] END CASE;] Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) The searched CASE statement follows the rules below: The conditions in the WHEN...
The CASE statement works like a simplified IF-THEN-ELSE statement and allows for multiple conditions to be tested.This starts with the keyword CASE followed by multiple conditionals statements. Each conditional statement consists of at least one pair of WHEN and THEN statements. Where WHEN specifies...
CASE表达式是用来判断条件的,条件成立时返回某个值,条件不成立时返回另一个值。 语法: CASEWHENComparsionConditionTHENresultWHENComparsionConditionTHENresultELSEotherEND (注:各分支返回的数据类型需一致。) (注:when子句一定要有排他性,因为当when子句为真时,剩余的when子句会被忽略。) ...
WITH EXECUTE PLAN WRITETEXT 此外,ISO 标准定义了保留关键字列表。不要使用 ISO 保留关键字作为对象名和标识符。ODBC 保留关键字列表(如下表所示)与 ISO 保留关键字列表相同。 注意 ISO 标准保留关键字有时可能比 SQL Server 限制更多,有时则更少。例如,ISO 保留关键字列表包含 INT。SQL Server 不必将此区分为...
Hi, I am trying to get data from a table to a datapage calculated field based on conditions that are chosen in the data page.. I get to work without any CASE & WHEN conditions i.e. if I only have to SELECT from one column, but that only takes me halfway.
The downside of the simple CASE statement is that you can only check for equality. The IIF function With SQL Server 2012, theIIF functionwas introduced into the T-SQL language. The syntax is as follows: IIF(<condition>,<expression if true>,<expression if false>) ...
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. ...