A. DROP TABLE Em_temp B. DELETE TABLE Em_temp C. DROP FILE Em_temp D. DELETE FILE E. m_temp 相关知识点: 试题来源: 解析 A 正确答案:A解析:本题考查SQL语句删除表。格式DROP TABLE。DROPTABLE直接从磁盘上删除所对应的.dbf文件。题目删除表Em_temp。 知识模块:关系数据库标准语言SQL反馈...
A DELETE query in SQL is used to remove one or more rows from a table based on certain conditions. It’s a powerful operation that requires caution, as the deleted data is permanently removed from the table. Here’s the basic structure of a DELETE query: DELETE FROM table_name WHERE con...
If you delete all rows in a table by using DELETEtablenameor use the TRUNCATE TABLE statement, the table exists until it is dropped. Large tables and indexes that use more than 128 extents are dropped in two separate phases: logical and physical. In the logical phase, the existing allocatio...
___ 8. There is a special way to format the syntax to remove temp tables. ___ 9. If you use the temporary table after the DROP TABLE command runs, the program will likely run smoothly. ___ 10. DROP TABLE is a command used to delete or drop the temporary table and all of it...
ALTER TABLE CREATE DELETE DENY DROP FETCH GRANT INSERT OPEN REVOKE SELECT TRUNCATE UPDATE Batch-scoped Transactions Applicable only to multiple active result sets (MARS), a Transact-SQL explicit or implicit transaction that starts under a MARS session becomes a batch-scoped transaction. A batch-scope...
在为SELECT语句生成查询计划时,查询优化器会避免使用驻留在脱机文件组中的非聚集索引和索引视图。 这样,这些语句就会成功。 但是,如果脱机文件组包含目标表的堆或聚集索引,SELECT语句将失败。 此外,如果INSERT、UPDATE或DELETE语句修改的表的索引包含在脱机文件组中,这些语句将失败。
_table_name [ ( ref_column [ ,... n ] ) ] [ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression ) } <table_index> ...
Access Code - DELETE Statement with DISTINCTROW and T-SQL Access Now() vs. T-SQL GETDATE() ? ADD and SUBTRACT depending on the condition is CASE STATEMENT ADD COLUMN to variable table? Add prefix in data column Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a lar...
By default, the temp tables are automatically deleted when the current session ends or the database connection is terminated. However, there may be situations where you need to delete a temp table before the session ends. In such cases, the DROP TABLE command is the appropriate solution for...
_table_name [ ( ref_column [ ,... n ] ) ] [ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression ) } <table_index> ...