‘MERGE’ statement is a new feature in SQL Server 2008. It can be used to perform insert, update and delete operation on a destination table simultaneously based on the results of a join with a source table. Well, it sounds like a bit confusing, but let's see an example on how it ...
In SQL, I have two tables with same column names. Want to query if there is any difference in the column values and if yes will update the values(in the first table) else if the row is not found will insert the row using the MERGE statement. As of now, I have to mention all the...
一个Merge 语句中出现的 Matched 操作,只能出现一次 UPDATE 或者 DELETE 语句,否则就会出现下面的错误 - An action of type 'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. Merge 语句最后必须包含分号,以 ; 结束。 ps:SQL Server中Merge-using的用法 在执行之前: ...
...比如,这样的一句SQL语句SELECT 1 FROM dual WHERE a = bSELECT 1 FROM dual WHERE a = bJSqlParser可以将其解析为如下对象结构 SQL...来访问这句SQL语句中的各个要素:Statement statement = CCJSqlParserUtil.parse(sqlStr);if (statement instanceof Select...,包括:OracleMS SQL Server and Sybase...
...如果单独使用 INSERT, UPDATE和DELETE语句,则需要三个单独的语句,来使 source 表中的匹配行的数据更新到 target表。 但是,使用 merge 可以同时执行三个操作。...下面是 merge语句的语法: MERGE target_table USING source_table ON merge_condition WHEN MATCHED THEN update_statement...
SQL> ROLLBACK; Rollback complete. SQL> 在上面例子中, MERGE语句影响到是产品id为1502, 1601和1666的行. 它们的产品名字和种 类被更新为表newproducts中的值. 下面例子省略UPDATE子句, 把表NEWPRODUCTS中新的PRODUCT_ID插入到表PRODUCTS中, 对于在两个表中能够匹配上PRODUCT_ID的数据不作任何处理. 从这个例子...
The SQL Server MERGE command is the combination of INSERT, UPDATE and DELETE commands consolidated into a single statement. Here is how to get started with the SQL Server MERGE command: Start off by identifying the target table name which will be used in the logic. ...
SQL Server 2008 MERGE More than UPSERT Comparing performance for the MERGE statement to SELECT, INSERT, UPDATE or DELETE Using MERGE in SQL Server to insert, update and delete at the same time Using the SQL Server MERGE Statement to Process Type 2 Slowly Changing Dimensions...
"String or binary data would be truncated.\r\nThe statement has been terminated." "String or binary data would be truncated" and field specifications “Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered in...
在这个例子中,我将把一个产品表作为一个目标表,把UpdatedProducts表作为一个包含产品更新列表的源表。接着,我将使用MERGE SQL命令让目标表同步于源表。 首先,让我们创建一个目标表和一个源表,并把数据配置到这些表中。 MERGE SQL statement - Part 1 ...