带有连接的Oracle SQL case语句产生奇怪的结果[duplicate]这是意料之中的，我会说，因为一个名字排除另一个-你不可能同时有英语和阿拉伯语的名字，你能吗？名字要么是英语，要么是阿拉伯语。示例数据：您的描述中使用了大写的GLOBAL，但您的代码中使用了大小写混合的'Global'。根据您的注解，代码中也应该使用'GLOBAL'
PolledDataAvailableStatement指定适配器执行的 SQL 语句,以确定是否有任何数据可用于轮询。 仅当记录可用时,才会执行为PollingStatement绑定属性指定的 SELECT 语句。 默认值为SELECT 1 FROM DUAL,这意味着无论要轮询的表是否包含数据,适配器都必须继续轮询。
只读视图发生在查询中,该查询SELECT 列表中包含子查询的集合表达式,选择性操作符(DECODE 函数或者是CASE操作符) 或DISTINCT操作符; 或者是查询使用了链接(join),set操作符,聚合函数或者GROUP BY ,ORDER BY ,MODEL,CONNECT BY ,START WITH 子句时。最后两种子句时Oracle混合子句,用户支持递归查询。视图执行上述操作时,...
ACCOUNT 數據表是藉由執行範例所提供的 SQL 腳本,在 SCOTT 架構下建立。 若要深入瞭解範例,請參閱 架構範例。 複製 <SQLEXECUTE xmlns="http://Microsoft.LobServices.OracleDB/2007/03/SQLEXECUTE"> <SQLSTATEMENT>select * from ACCOUNT where ACCTID=:num</SQLSTATE...
This tutorial provides an introduction to the Structured Query Language (SQL), learn how to create tables with primary keys, columns, constraints, indexes, and foreign keys. Tutorial SQL Macros - Creating parameterised views This tutorial explains how to create a parameterized view using SQL Macros...
TDSQL PG版实现方法是将不再target_el以及columnref中的列作为group by列,通过pivot_expr_list对target_el中的聚集函数参数用case when进行重写,规则是“有值取值、没值取空”。 UNPivot可以将列属性转行数据, 本质是转化为 join lateral。实现方法是获取IN中的列,拼接成VALUES(…),将UNPIVOT column和FOR column...
it, the SQL query will return the value accounting rather than the number 10. If the deptno is not 10, 20, 30, or 40, then the CASE statement will fall through to the ELSE clause, which will return unassigned. Note that with a simple CASE statement, no comparison operators can be ...
21-12-2022 10:37:44 CST Error executing statement: java.sql.SQLRecoverableException: Io exception: Connection reset java.sql.SQLRecoverableException: Io exception: Connection reset at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101) at oracle.jdbc.driver.DatabaseError.new...
PostgreSQL Update Statement with Join What about PostgreSQL? In this case, the same concepts that work in SQL Server do the job also on PostgreSQL. We have just a few differences with the syntax as we do not specify the join. But we use the old join syntax with the WHERE clause. ...
SQL Macros – Changing The Query Shape Using Parameters? Leave a reply One thing I learned early on when I was getting to know SQL macros is that we cannot replace each and every part of a SQL statement with a macro. In the same way, working with table SQL macros, we cannot represent...