5: create table #table (empidint, empname varchar (25),Department varchar (25) ,Salaryint) 6: create clustered index #table_index1 on #table (empid asc ) 7: create nonclustered index #table_index2 on #table (Salary) include (Department,empid ) 8: insert into #table select S.empid,...
CREATE TABLE ##test ( a INT, b INT ); INSERT INTO ##test VALUES (1, 1); -- Obtain object ID for temp table ##test SELECT OBJECT_ID('tempdb.dbo.##test') AS 'Object ID'; 结果集如下。 输出 复制 1253579504 获取tempdb (2) 中给定对象 ID 1253579504 的全局临时表名称 SQL 复制 ...
BEGINTRAN;-- Create an In-memory OLTP transaction that accesses a system view in tempdbSELECTnameFROMtempdb.sys.tables;-- An attempt to create an In-memory OLTP transaction in the user database failsINSERTINTO<userdatabase>.<schema>.<memory-optimizedtable>VALUES(1);COMMITTRAN; ...
If a temporary table is created with a named constraint and the temporary table is created within the scope of a user-defined transaction, only one user at a time can execute the statement that creates the temp table. For example, if a stored procedure creates a temporary table with a name...
JOIN no_index ni ON fa.table_name= ni.table_name; 3.2 动态执行计划分析 示例:获取最近执行的慢查询计划 SELECT query_plan, total_time, rows_processedFROMgs_query_plan_cache WHERE exec_time >5000ORDERBY exec_time DESC; 四、生产环境注意事项 ...
Can Symmetric keys be used in a view? Can table-valued parameter be null? Can the "print" command be told not to send a "newline"? Can we alias name for temp table Can we creating index on non unique value columns on temporary tables Can we do MAX inside nested CASE Statement? Can...
(BULKN'C:\Temp\Sample1.tiff', SINGLE_BLOB) rs;-- Select data from FILESTREAM tableSELECT*FROMFSTiffs;-- Update a documentUPDATEFSTiffsSETFileContent = (SELECT*FROMOPENROWSET(BULKN'C:\Temp\Sample2.tiff', SINGLE_BLOB)ASrs )WHEREDocumentID =101;-- Delete a documentDELETEFSTiffsWHEREDocument...
SELECT * FROM OrdersTable WHERE ShipCity = 'Redmond';drop table OrdersTable--' 分号(;) 表示一个查询的结束和另一个查询的开始。双连字符 (--) 指示当前行余下的部分是一个注释,应该忽略。如果修改后的代码语法正确,则服务器将执行该代码。SQL Server 处理该语句时,SQL Server 将首先选择 OrdersTable ...
SELECT*INTO#TempTableFROM[YourDatabaseName].dbo.YourTable-- 之后可以对目标表进行覆盖、修复等操作 1. 2. 3. 4. 5. 灾难场景 在规划过程中,考虑潜在的灾难场景是非常必要的。 关系图 以下关系图展示了不同灾难场景对数据的影响: erDiagram 数据库 { ...
See sys.function_order_columns (Transact-SQL) for information on how to query for columns included in the sort-order for table-valued functions. Metadata The following table lists the system catalog views that you can use to return metadata about user-defined functions. 展开表 System view...