SELECT col1, col2, col3 INTO newTable FROM existingTable;
alter table 表 add constraint 约束名 default(默认值)for 列 数据插入 单条数据插入 insert into 表 (列) values(值); insert 表(列)select 值 多条数据插入 insert into 表(列)values(值),(值) insert 表(列,,,)select 值,,,union (排除重复) union all(不排除重复) select 值,,,克隆表数据 inse...
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,...
Sometimes Microsoft SQL Server tables are created that are no longer needed. To help keep the SQL relational database clean there is a need to delete these unneeded tables. In this tutorial we look at how to delete a table using the DROP TABLE SQL command. Solution We’ll look at the sy...
CREATE DATABASE Sales; GO USE [Sales]; GO CREATE TABLE Customer ( [CustomerID] INT NOT NULL, [SalesAmount] DECIMAL NOT NULL ); GO INSERT INTO Customer (CustomerID, SalesAmount) VALUES (1, 100), (2, 200), (3, 300); GO 在另一個 SQL Server 執行個體(訂閱者)上建立資料庫來接收資...
CREATE TABLE dbo.Cities ( Name VARCHAR(20), State VARCHAR(20), Location POINT); GO DECLARE @p POINT (32, 23), @distance FLOAT; GO SELECT Location.Distance (@p) FROM Cities; column_alias 這是取代查詢結果集中之資料行名稱的替代名稱。 例如,名稱為 Quantity 的資料行,可以指定 Quantity 或 ...
--Copy data from the public Azure storage account to the dimension_city table. COPY INTO [dbo].[dimension_city] FROM 'https://fabrictutorialdata.blob.core.windows.net/sampledata/WideWorldImportersDW/tables/dimension_city.parquet' WITH (FILE_TYPE = 'PARQUET'); --Copy data from the public ...
功能 SELECT INTO INTO 语句不支持 SELECT 子句。 将查询重写为 INSERT INTO Table SELECT。 功能 不完整的插入列列表 一般情况下,在 INSERT 语句中,必须为表中的所有列指定值。 但是,我们支持内存优化表上的 DEFAULT 约束和 IDENTITY(1,1) 列。 可以将这些列(如果为 IDENTITY 列,则必须)从 INSERT 列列表中...
INSERT INTO InsertDemo (STD_Guid, StName ,StBirthDate,StParentsPhone) VALUES (NEWID(), 'Johnson','2000-05-12','59785425') Checking the target table, you will see that a NULL value is assigned to that GUID column for all previously existing columns, and a unique GUID value assigned to...
USE[tempdb]; GOCREATETABLETruncateTest (IDINTIDENTITY(1,1)NOTNULL); GOINSERTINTOTruncateTestDEFAULTVALUES; GO 3 在截斷之前檢查數據。 SQL SELECT*FROMTruncateTest; GO 截斷交易內的數據表,並檢查數據列數目。 SQL BEGINTRANSACTION;TRUNCATETABLETruncateTest;SELECT*FROMTruncateTest; ...