http://stackoverflow.com/questions/7331725/how-to-delete-from-source-using-merge-command-in-sql-server-2008
When you don't know the default value for a column in the VALUES clause, use ___. DEFAULT What other clause must be used when the MERGE uses WHEN MATCHED THEN INSERT? VALUES You can't do a DELETE in the MERGE command without: WHEN MATCHED This is the only function of MERGE that ne...
case c: Command => // Since Command execution will eagerly take place here, // and in most cases be the bulk of time and effort, // with the rest of processing of the root plan being just outputting command results, // for eagerly executed commands we mark this place as beginning of...
SQL database in Microsoft Fabric The MERGE statement runs insert, update, or delete operations on a target table from the results of a join with a source table. For example, synchronize two tables by inserting, updating, or deleting rows in one table based on differences found in the other...
What would this MERGE command do? It would do the symmetric opposite of SPLIT. SPLIT introduces a new split point into the federation. So MERGE would glue that back together. Here is what that would look like in real life; imagine a member layout like member#1: 0 to 5...
Applies to: Databricks SQL Databricks Runtime Merges a set of updates, insertions, and deletions based on a source table into a target Delta table. This statement is supported only for Delta Lake tables. This page contains details for using the correct syntax with the MERGE command. See ...
这种操作完全可以用merge into语句代替，不仅省时省力而且条理更清晰，一个SQL语句直接完成插入，如果有...
foreach的主要用在构建in条件中,它可以在SQL语句中进行迭代一个集合。foreach元素的属性主要有item,index,collection,open,separator,close。item表示集合中每一个元素进行迭代时的别名,index指定一个名字,用于表示在迭代过程中,每次迭代到的位置,open表示该语句以什么开始,separator表示在每次进行迭代之间以什么符号作为分...
(sqlText) parsedPlan match { case e: ExplainCommand => // 改写EXPLAIN命令 e.copy(logicalPlan = replaceRowLevelCommands(e.logicalPlan)) case p => // 改写UPDATE/DELETE/MERGE INTO命令 replaceRowLevelCommands(p) } } } private def replaceRowLevelCommands(plan: LogicalPlan): LogicalPlan = ...
La clause OUTPUT est la méthode recommandée pour interroger ou compter les lignes affectées par une instruction MERGE. Pour plus d’informations sur les arguments et le comportement de cette clause, consultez Clause OUTPUT (Transact-SQL)....