In this query, the CASE statement is used to sort the results based on either the 'NAME' column or the 'ADDRESS' column, depending on the value of the 'NAME' column. If the 'NAME' column starts with 'K', the results are sorted by the 'NAME' column; otherwise, the results are ...
by itself without quotes, is a valid entry. It will be treated the same as if I had not included the target column in the list of columns in the insert statement.
sql case statement
SQL 条件语句 (IF, CASE WHEN, IFNULL) 1、IF 1.1 表达式: IF( expr1 , expr2 , expr3 ) expr1条件,条件为true,则值是expr2 ,false,值就是expr3 示例; SELECT o.id,u.account,catagory
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,
SELECTorder_id, customer_id,CASEWHENamount >=400THEN(amount - amount *10/100)ENDASoffer_priceFROMOrders; Run Code 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...
In other words, PL/SQL raises a CASE_NOT_FOUND error if you don’t specify an ELSE clause and the result of the CASE expression does not match any value in the WHEN clauses. Note that this behavior of the CASE statement is different from the IF THEN statement. When the IF THEN state...
2.2定义时已经加了NOT NULL限制条件的字段 3 Oracle中null值说明: 3.1等价于没有任何值、是未知数。 3.2NULL与0、空字符串、空格都不同。 3.3对空值做加、减、乘、除等运算操作,结果仍为空。 3.4NULL的处理使用NVL函数。 3.5比较时使用关键字用“is null”和“is not null”。
SQL语句尚未结束(SQL_STATEMENT_NOT_YET_COMPLETE) 类08 - 连接异常 08000 连接异常(CONNECTION_EXCEPTION) 08003 连接不存在(CONNECTION_DOES_NOT_EXIST) 08006 连接失败(CONNECTION_FAILURE) 08001 SQL客户端不能建立SQL连接(SQLCLIENT_UNABLE_TO_ESTABLISH_SQLCONNECTION) 08004 SQL服务器拒绝建立SQL连接(SQLSERVER_REJ...
sql_statement_recompile扩展事件 (XEvent) 报告语句级重新编译。 当任何类型的批处理需要语句级重新编译时,会发生此 XEvent。 这包括存储过程、触发器、即席批处理和查询。 可通过几个接口来提交批处理,这类接口包括 sp_executesql、动态 SQL、“准备”方法或“执行”方法。