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Group character merge SQL statement merge strings by a field (simple merge), SQL statement Title: Merge strings by a field (simple merge) Description: merges the following data into the
The merge statement is often used in the conversion and loading processes in the Data warehouse, and here is a quick summary. The merge statement is a new syntax for merging update and INSERT statements oracle9i. Through the merge state
Customers as CUsing CUST_UPDATES_WEEK_10 as UOn c.custid = U.custidWhen not matched thenInsert (Custid,addr,phone) VALUES (U.custid,u.addr,u.phone)When matched thenUpdate set ADDR=U.ADDR, Phone=u.phone Let's analyze the SQL statement above. Line 1th Merge into Customers as C indicates Customers as the destination table. The 2nd row using Cust_updates_week_10 as U indicates that the cust_updates_week_10 is
Tags: same different. NET match Big Data operations additions and deletions change large number strong tail/*merge into detailed introductionThe merge statement is a new syntax for merging the UPDATE and INSERT statements oracle9i.With the merge statement, another table is q
From http://blog.chinaunix.net/space.php? Uid = 16981447 Do = Blog cuid = 430716 was simply formatted and a little original stuff was added. Oracle9i introduces the merge command. You can execute the inserts and updates operations on a table in an SQL statement at the same time. the merge command selects rows from one or more data sources to update or inserting
matched-if the match succeeds, the association condition succeeds (you should update all other field values in SOURCE to the TARGET table) When notmatched by TARGET-if the match is unsuccessful (there is no record in target but the source table has, the source table has more new data and should be inserted into the target table) When notmatched by source-if the match is unsuccessful (there is no record in source but the target table has, the source table may have deleted the data, so target s
Original: Http://blog.csdn.net/bruesz/archive/2007/11/20/1894836.aspx motivation: Want to use an SQL statement directly in Oracle to Insert/update operations. Description: When writing SQL statements, we often encounter a large number of simultaneous insert/update statements, that is, updating (update) when there is a record, and inserting (insert) when there is no data. actual combat: Next we have a task, there is a table T, there are two fields a,b
views; Multiple table INSERT statements cannot be performed on the remote table; Cannot use table set expression; Cannot exceed 999 target columns; A multi-table INSERT statement cannot be executed in parallel in a RAC environment or when the target table is an index-organized table or a bitmap index on the target table; Multi-Table INSERT statements do not support execution plan stability; A subquery in a multiple-table INSER
Today, we encountered a problem when using the Merge statement. When the source table data set is empty, merge will not work. Today, we encountered a problem when using the Merge statement. When the source table data set is empty, merge
---------- ------------------------------ 1 A 2 A In the update set syntax for the merge, T2. T1. Name This error is also received, and the T2 prefix is ignored. This does not result in an error if T2 is not replaced by any other character: This column more highlights: http://www.bianceng.cn/database/Oracle/ Sql> MERGE into T2 2 USING (SELECT ID, NAME from T1) T1 3 on (t1.id = t2.id) 4 when matche
The split and merge SQL statement string contains an SQL string, $ SQL nbsp; quot; INSERT nbsp; INTO nbsp; tablename nbsp; (field1, field2, field3, field4, field5, field6, field7, field8) nbsp; VALUES nbsp; ( #3 split and merge SQL statement strings There is an SQL string, $ SQL = "INSERT INTO tablename (field1,
This article uses an SQL statement to merge multiple rows in a column of an SQL table into a single value and a string group. If you need it, refer to "merge. This article uses an SQL statement to merge multiple rows in a column of an SQL table into a single value and a str
The split and merge SQL statement string contains an SQL string, $ SQL nbsp; quot; INSERT nbsp; INTO nbsp; tablename nbsp; (field1, field2, field3, field4, field5, field6, field7, field8) nbsp; VALUES nbsp; ( #3 split and merge SQL statement strings There is an SQL string, $ SQL = "INSERT INTO tablename (field1,
Merge into [e-mail protected] b using Tb_sys_sqlscripe C on (b.pk=c.pk) -merge table from center to branch, synchronization is based on two tables Pkwhen Matched then update set B.sqlscripe=c.sqlscripe,b.author=c.author --If the PK value is the same, update the value of the specified table to the target table when not matched then-if the PK value is different, insert the en
where UserName = @ UserName)As sr (UserName, [Level]) on tg. UserName = sr. UserNameWhen matched thenUpdate set [Level] = sr. [Level] -- update authorization LevelWhen not matched by target thenInsert (UserName, [Level]) values (@ UserName, 0) -- represents a visitorOutput $ action;If the execution result is UPDATE, the UPDATE operation is executed, which is exactly what we want.However, if we assign @ UserName to 'user6', we hope to insert a record in TargetTable, but the actual execution resu
Label:Written in front of the words: Before the merge statement, feel no use, can be used in other ways to replace, recently looked at the merge statement, it is very useful, can write a lot less code, it looks very compact, of course, there are other advantages.= = = Text starts =====SQL Server 2008 introduces the
If a record is required to be implemented in MySQL, insert is not present, and the update operation does not exist. You can use the following statement: To update a field: INSERT into TBL (COLUMNA,COLUMNB,COLUMNC) VALUES (1,2,3) on DUPLICATE KEY UPDATE columna=if (Columnb>0,1,columna) To update multiple fields: INSERT into TBL (COLUMNA,COLUMNB,COLUMNC) VALUES (1,2,3) on DUPLICATE KEY UPDATE columna=if (Columnb>0,1,columna), Columnb=if (C
Tags: mysq share picture BSP City DIV SQL statement alt space OralceEffect:Oralce notation:Select Wm_concat (a.title) as Citys from Tmpcity ASQL Server notation:Select Stuff ((select ', ' +a.title from tmpcity A for XML PATH (') '), 1, 1, ") as CitysMySQL notation:Select Group_concat (a.title) as citys from Tmpcity A; --The default comma-delimitedSelect Group_concat (A.title SEPARATOR ") as Citys from Tmpcity A; --separated by a spaceSQL
,bb 2 AAA,BBB,CCC (the number of rows affected is 2 rows)*/--===================================================================================2new workaround (in SQL Server 2005 with outer apply, etc.). ) CREATE TABLE TB (IDint, Value varchar (Ten) ) insert into TB values (1,'AA') insert into TB values (1,'BB') insert into TB values (2,'AAA') insert into TB values (2,'BBB') insert into TB values (2,'CCC') Go--Query Processing SELECT*From (select DISTINCT ID from TB) A OUTER APPLY (SELECT [Valu
Tags: pre allow lookup sync can use title Cond PACOriginal address: SQL Server-Use the Merge statement to synchronize comparison between table data There are many ways to implement synchronization between table data, such as deleting and then re-insert, or writing some other branch criteria to determine whether to insert or UPDATE. Included in the SSIS package is the ability to synchronize between table dat
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