As MERGE statement in SQL, as discussed before in theprevious post, is the combination of threeINSERT,DELETEandUPDATEstatements. So if there is aSource tableand aTarget tablethat are to be merged, then with the help of MERGE statement, all the three operations (INSERT, UPDATE, DELETE) can ...
BigQuery 2025-04-01Db2 (LUW) 12.1Derby 10.17.1.0H2 2.3.232MariaDB 11.7MySQL 9.2.0Oracle DB 23.7PostgreSQL 17SQL Server 2022SQLite 3.49.0MERGE statement with DELETE branch — F314 Related F312, “MERGE statement” F313, “Enhanced MERGE statement” Normative References F314, “MERGE statement...
如果有两个 WHEN MATCHED 子句,一个必须指定 UPDATE 操作,另一个必须指定 DELETE 操作。 如果在<merge_matched>子句中指定了 UPDATE,并且根据<merge_search_condition>中有多行与target_table中的一行匹配, SQL Server 便会返回错误。 MERGE 语句无法多次更新同一行,也无法更新和删除同一行。 WHEN NOT MATCHED...
如果有两个 WHEN MATCHED 子句,一个必须指定 UPDATE 操作,另一个必须指定 DELETE 操作。 如果在<merge_matched>子句中指定了 UPDATE,并且根据<merge_search_condition>中有多行与target_table中的一行匹配, SQL Server 便会返回错误。 MERGE 语句无法多次更新同一行,也无法更新和删除同一行。 WHEN NOT MATCHED...
DELETE action. When UPDATE is specified in the<merge_matched>clause, and more than one row ofmatches a row intarget_tablebased on<merge_search_condition>, SQL Server returns an error. The MERGE statement can't update the same row more than once, or update and delete the same row. WHEN...
在SQL Server 2008 中,您可以使用 MERGE 陳述式,在單一陳述式中執行插入、更新或刪除作業。MERGE 陳述式可讓您將資料來源與目標資料表或檢視表進行聯結,然後根據該聯結的結果,針對目標執行多個動作。例如,您可以使用 MERGE 陳述式來執行下列作業: 有條件地在目標資料表中插入或更新資料列。
DELETE 删除target_table中的匹配行。 WHEN NOT MATCHED 指定当匹配条件计算结果为 False 或 Unknown 时要运行的操作。只能为此子句指定 INSERT 插入操作。 INSERT 根据match_condition,从source_table插入与target_table中的任何行都不匹配的target_table行。可以按任意顺序列出目标col_name。如果您不提供任何col_name值...
WHEN MATCHED clause in SQL Server MERGE statement is used to update, delete the rows in the target table when the rows are matched with the source table based on the join condition. In this case, Locations is the target table, Locations_stage is the source table and the column LocationID...
{ throw new SparkException( "The ON search condition of the MERGE statement matched a single row from " + "the target table with multiple rows of the source table. This could result " + "in the target row being operated on more than once with an update or delete " + "operation and ...
Pour plus d’informations, consultez Condition de recherche (Transact-SQL). Spécifie un ou plusieurs indicateurs de table qui sont appliqués à la table cible pour chaque opération INSERT, UPDATE ou DELETE exécutée par l'instruction MERGE. Le mot clé WITH et les parenthèses sont obligatoire...