http://www.ludou.org/update-multiple-rows-with-different-values-and-a-single-sql-query.html
Can I update multiple columns with different values for different rows? What happens if I forget the WHERE clause when updating multiple columns? How do I handle NULL values when updating multiple columns? Can I update columns using data from another table? Topics SQL Data Engineering Allan Ouko...
这对于 UPDATE 和 DELETE 触发器很常见,因为这些语句经常影响多行。 而这对于 INSERT 触发器比较少见,因为基本 INSERT 语句仅添加单行。 但是,由于 INSERT 触发器可以通过 INSERT INTO (table_name) SELECT 语句触发,因此插入多行可能导致调用单个触发器。 在下列情况下关于多行的注意事项尤为重要:DML...
· 错误:1315 SQLSTATE: 42000 (ER_UPDATE_LOG_DEPRECATED_IGNORED) 消息:更新日志已被放弃,并用二进制日志取代,SET SQL_LOG_UPDATE被忽略。 · 错误:1316 SQLSTATE: 42000 (ER_UPDATE_LOG_DEPRECATED_TRANSLATED) 消息:更新日志已被放弃,并用二进制日志取代,SET SQL_LOG_UPDATE已被截短为SET SQL_LOG_BIN。
SQL_CA2_MAX_ROWS_DELETE = 当游标是动态游标时,SQL_ATTR_MAX_ROWS语句属性会影响 DELETE 语句。SQL_CA2_MAX_ROWS_UPDATE = 当游标是动态游标时,SQL_ATTR_MAX_ROWS语句属性会影响 UPDATE 语句。SQL_CA2_MAX_ROWS_CATALOG = 当游标是动态游标时,SQL_ATTR_MAX_ROWS语句属性会影响 CATALOG 结果集。SQL_CA2_...
add datarow matching multiple column values add image name into the drop down list Add JavaScript & CSS in UserControl Add multiple location paths into the web.config Add new column in existing CSV file using C# Add query string when user clicks back button Add Reference Issue Add rows to ...
Change column values in existing rows of a table or view (UPDATE). Update or insert rows conditionally into a table orview(MERGE). Remove rows from tables or views (DELETE). View theexecution planfor a SQL statement (EXPLAINPLAN).
The BULK COLLECT INTO clause can improve the performance of queries that reference collections. You can use BULK COLLECT INTO with tables of scalar values, or tables of %TYPE values. The PL/SQL block in Example 6-10 queries multiple values into PL/SQL tables, with and without...
If any of the databases that are part of the instance are using columns of data type XML or XML schema repository objects, then a different instance will be required to establish an instance with multiple database partitions. If the databases in the instance are not actually intended for stora...
支援Multiple Active Result Sets (MARS)。 如果 MARS 工作階段在有作用中結果集的情況下,發出資料修改陳述式 (例如 INSERTUPDATE或DELETE),就會為修改陳述式所影響的資料列建立版本。 支援指定 ONLINE 選項的索引作業。 支援以資料列版本設定為基礎的交易隔離等級: 新的READ COMMITTED 隔離等級實作...