若原表中出现重复记录,而该记录是目标表中没有的,则会将所有的重复记录插入到目标中 Merge关键字后面使用了多个WHEN……THEN,是可选的,可以是紧紧新增或仅仅删除 目标表和源表可以是一个查询结果集 4.参考 MERGE (Transact-SQL) SQL - SQL Server 之Merge函数使用详解...
写在前面的话:之前看过Merge语句,感觉没什么用,完全可以用其他的方式来替代,最近又看了看Merge语句,确实挺好用,可以少写很多代码,看起来也很紧凑,当然也有别的优点。 ===正文开始=== SQL Server 2008 引入了Merge关键字,主要是在一条语句里面可以执行insert、update、delete操作,以实现用一个源对象的数据对目标...
SQL Server 2008 T-SQL之Merge语法 Merge语法是对插入,更新,删除这三个操作的合并。根据与源表联接的结果,对目标表执行插入、更新或删除操作。例如,根据在另一个表中找到的差异在一个表中插入、更新或删除行,可以对两个表进行同步。 我这里用一个简单的例子来解释一下 USE tempdb GO --创建一个临时的订单表 ...
Transact-SQL 语法约定语法Azure Synapse Analytics 的语法: syntaxsql 复制 [ WITH <common_table_expression> [,...n] ] MERGE [ INTO ] <target_table> [ [ AS ] table_alias ] USING [ [ AS ] table_alias ] ON <merge_search_condition> [ WHEN MATCHED [ AND <clause_search_condition>...
syntaxsql复制 FROM{[ , ...n ] }::={ [database_name. [schema_name] . |schema_name. ]table_or_view_name[AS]table_or_view_alias|derived_table[AS]table_alias[ (column_alias[ , ...n ] ) ] |<joined_table>}<joined_table>::={<join_type>ONsearch_condition|CROSSJOIN|left_table_...
syntaxsql 複製 FROM { [ , ...n ] } ::= { [ database_name . [ schema_name ] . | schema_name . ] table_or_view_name [ AS ] table_or_view_alias [ <tablesample_clause> ] | derived_table [ AS ] table_alias [ ( column_alias [ , ...n ] ) ] | <joined_table> } ...
The SQL Server MERGE statement offers a wide range of functionality and flexibility and is compatible with ANSI standard SQL:2008. SQL Server has many extensions to MERGE that provide efficient T-SQL solutions for synchronizing data. Syntax
命名空間:Microsoft.SqlServer.TransactSql.ScriptDom 組件:Microsoft.SqlServer.TransactSql.ScriptDom (在 Microsoft.SqlServer.TransactSql.ScriptDom.dll 中) 語法 VB '宣告PublicOverridableSubExplicitVisit ( _ nodeAsMergeStatement _ )'用途DiminstanceAsTSqlFragmentVisitorDimnodeAsMergeStatement instance.ExplicitVisit...
OperationMemory-optimized tables as target of MERGEMemory-optimized tables cannot be the target of aMERGEoperation. UseINSERT,UPDATE, andDELETEstatements instead. Indexes on Memory-Optimized Tables The following table lists the Transact-SQL features and keywords that can appear in the message text of ...
The following example shows the SQL Server syntax that runs a stored procedure or function. [ { EXEC | EXECUTE } ] { [ @return_status = ] { module_name [ ;number ] | @module_name_var } [ [ @parameter = ] { value | @variable [ OUTPUT ] | [ DEFAULT ...