WebSELECT Example Without DISTINCT. The following SQL statement selects all (including the duplicates) values from the "Country" column in the "Customers" table: Example Get your own SQL Server. SELECT Country FROM Customers; Try it Yourself ». Now, let us use the SELECT DISTINCT statement and see the result. WebTHEN CASE WHEN salary > 1000. THEN 1 ELSE 0 END. ELSE 1 END = 1 ) 如果单纯使用Check，如下所示. CONSTRAINT check_salary CHECK. ( sex = '2' AND salary > 1000 ) 女职员的条件倒是符合了，男职员就无法输入了。. Select top 100 State,JoinState, (case when State=1 and Joinstate=0 then 2 when State=1 and JoinState=1 then 1 ...
sql - Case in Select Statement - Stack Overflow
WebThe CASE statement cannot have an ELSE NULL clause, and it is terminated with END CASE instead of END . For the first syntax, case_value is an expression. This value is compared to the when_value expression in each WHEN clause until one of them is equal. When an equal when_value is found, the corresponding THEN clause statement_list executes. WebIn this example, the type of the test column is VARBINARY (4) (a string type). NULLIF ( expr1, expr2) Returns NULL if expr1 = expr2 is true, otherwise returns expr1. This is the same as CASE WHEN expr1 = expr2 THEN NULL ELSE expr1 END . The return value has the same type as the first argument. mysql> SELECT NULLIF (1,1); -> NULL mysql> SELECT ... broadband internet providers in thane
How to use Mysql SELECT CASE WHEN expression - Stack Overflow
WebSummary: in this tutorial, you will learn how to use the MySQL CASE expression to add if-else logic to queries.. Introduction to MySQL CASE expression. MySQL CASE expression is a control flow structure that allows you to add if-else logic to a query. Generally speaking, you can use the CASE expression anywhere that allows a valid expression e.g., SELECT, … WebThe CASE statement goes through conditions and return 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 … broadband internet providers in nashik