How can you get the current database name via T-SQL? how create flag variable in sql using condition How do I achieve - in SQL - something like "On Error Resume Next" in VB? How do I add a securable to a database role? How do I aggregate on more than one column within a PIVO...
CREATE DATABASE MYDB1 GO (2)下面例子在创建数据库MYDB2时指定文件组,其数据文件有主文件组和MYDB2_GROUP文件组组成。MYDB2数据库所包含的数据文件和日志文件,以及它们的参数如图所示: CREATEDATABASEMYDB2 ON PRIMARY( NAME=MYDB2_P1_dat, FILENAME=‘c:\mssql7\data\MYDB2_P1.mdf’, SIZE=5, MAXSIZE...
而這些定義可以參考線上圖書: 06 Database Engine→技術參考→Transact-SQL 參考→資料類型 07 最後,若想要一次查詢所有資料類型的屬性,可以透過 sys.types 系統檢視,範例 語法如下: select name,max_length,precision,scale,collation_name,is_nullable,is_ assembly_type from sys.types 語言基 執行結果如圖 4-29...
DB_ID(databaseName) return int,函数接受一个数据库名称作为输入,返回它的内部数据库ID 如果输入的数据库不存在,那么返回的将是NULL,这是检查数据库是否存在的简单方法。 --如果不存在testdb的数据库,那么重新创建一个叫testdb的数据库IFDB_ID('testdb')ISNULLCREATEDATABASEtestdb 更多详细的建库建表,另看:...
$(target_group_name) 例如,若要將執行相同作業所產生的所有結果分為同一群組,請使用$(job_execution_id),如下列命令所示: SQL @command = N'SELECTDB_NAME() DatabaseName, $(job_execution_id)ASjob_execution_id, *FROMsys.dm_db_resource_statsWHEREend_time >DATEADD(mi,-20,GETDATE());' ...
[, 'database_principal'])、IS_SRVROLEMEMBER ('role' [, 'login'])、ORIGINAL_LOGIN()、SESSION_USER、CURRENT_USER、SUSER_ID(['login'])、SUSER_SID(['login'] [, Param2])、SUSER_SNAME([server_user_sid])、SYSTEM_USER、SUSER_NAME、USER、USER_ID(['user'...
SELECT * FROM #TempTable ORDER BY Table_Name 1. --Delete Temporay Table 1. DROP TABLE #TempTable 1. END 1. 3.清除指定DB的事务日志。开发过程中我们把DB的日志搞得很大 BACKUP log [myDatabase] with truncate_only 1. go 1. DBCC SHRINKDATABASE ([myDatabase], 10, TRUNCATEONLY) ...
How can you get the current database name via T-SQL? how create flag variable in sql using condition How do I achieve - in SQL - something like "On Error Resume Next" in VB? How do I add a securable to a database role? How do I aggregate on more than one column within a PIVOT...
[ database_name . ] [ schema_name . ] sequence_name [ OVER (<over_order_by_clause>) ] –=== –获取范围的序列值 sp_sequence_get_range [ @sequence_name = ] N'<sequence>’ , [ @range_size = ] range_size , [ @range_first_value = ] range_first_value OUTPUT [, [ @range_...
choose a name for the primary key column that flows naturally from the table name. Then it's easier to recognize when that column is a foreign key in other tables. You'll notice, for example, that all the primary keys in the TSQL2012 database are just the table name with "id" on ...