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。) CASE表达式的用途: 1,转换...
以上LINQ语句转换成SQL语句如下: CASEWHEN([ul].[IsDisabled]=1OR[l].[IsDisabled]=1)THENcast(1asbit)WHEN(NOT([ul].[IsDisabled]=1OR[l].[IsDisabled]=1))THENcast(0asbit)ENDAS[IsDisabled]
SQL LIKE Statement Tutorial Like any operator, the SQL Server LIKE operator goes between the two expressions/patterns it will be evaluating. The expressions can be columns or hard coded values, both of which can include wildcard characters (more on those below). As with most other operators, ...
sql case statement
Here are 3 different ways to apply a case statement using SQL: (1) For a single condition: Copy CASE WHEN condition_1 THEN result_1 ELSE result_2 END AS new_field_name (2) For multiple conditions using AND: Copy CASE WHEN condition_1 AND condition_2 THEN result_1 ELSE result_2 END...
SQL0549N 因為連結選項 DYNAMICRULES RUN 對 object-type2 而言無效,所以 object-type1 object-name1 不容許 statement 陳述式。 解說 程式試圖發出所指出的 SQL 陳述式,該陳述式是只能在表現出執行行為的套件中動態準備的幾個 SQL 陳述式之一。這類的 SQL 陳述式包括: 動態GRANT 陳述式 動態REVOKE 陳述式 ...
CASE语句只返回第一个符合条件的值,剩下的部分将会被自动忽略。 The CASE statement 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 tr...
SQL CASE statement evaluates a condition and returns a result that meets that condition. If none of the conditions is evaluated to TRUE it returns a value from the ELSE block. In simple words, the CASE expression is the way to build the IF - THEN logic into SQL. ...
CASE is a Control Flow statement that acts a lot like an IF-THEN-ELSE statement to choose a value based on the data. The CASE statement goes through conditions and returns a value when the first condition is met. So, once a condition is true, it will short circuit, thereby ignoring lat...
Msg 451, Level 16, State 1, Line 1 Cannot resolve collation conflict for column 1 in SELECT statement. SQL SELECTPATINDEX((CASEWHENid>10THENGreekColELSELatinColEND),'a')FROMTestTab; 结果集如下。 输出 Msg 446, Level 16, State 9, Server LEIH2, Line 1 Cannot resolve collation conflict fo...