sql server create table unique column
SQL Server UNIQUE constraints allow you to ensure that the data stored in a column, or a group of columns, is unique among the rows in a table. ); SQL Server automatically creates a UNIQUE index to enforce the uniqueness of data stored in the columns that, Create a nonclustered index on a table or view CREATE INDEX i1 ON t1 (col1); -- Create a clustered index on a table and use a 3-part name ..., Simple CREATE TABLE Syntax (common if not using options) .... 為索引的索引鍵資料行，或任何PRIMARY KEY 或UNIQUE 條件約束的一部分。, Set column as unique in SQL Server from the GUI: ... Make sure your column does not violate the unique constraint before you begin.,This SQL Server tutorial explains how to create, add, and drop unique ... A unique constraint is a single field or combination of fields that uniquely defines a record. ... to create. column1, column2: The columns that you wish to create in the table ,The following SQL creates a UNIQUE constraint on the "ID" column when the "Persons" table is created: SQL Server / Oracle / MS Access: CREATE TABLE ... ,UNIQUE 唯一限制(SQL UNIQUE Constraint). UNIQUE 用來保證欄位在資料表中的唯一性，約束資料表中的欄位不能有重複的 ... SQL Server / Oracle / MS Access , UNIQUE 和CHECK 是兩種類型的條件約束，可用來強制執行SQL ServerSQL .... CREATE TABLE CheckTbl (col1 int, col2 int); GO CREATE ..., TransactionHistoryArchive4 ( TransactionID int NOT NULL, CONSTRAINT AK_TransactionID UNIQUE(TransactionID) ); GO ..., UnitMeasure table using the Name column. CREATE UNIQUE INDEX AK_UnitMeasure_Name ON Production.UnitMeasure (Name); GO.
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 sql server create table unique column 相關參考資料
An Essential Guide to SQL Server UNIQUE Constraint
SQL Server UNIQUE constraints allow you to ensure that the data stored in a column, or a group of columns, is unique among the rows in a table. ); SQL Server automatically creates a UNIQUE index to en... http://www.sqlservertutorial.n CREATE INDEX (Transact-SQL) - SQL Server - Microsoft Docs
Create a nonclustered index on a table or view CREATE INDEX i1 ON t1 (col1); -- Create a clustered index on a table and use a 3-part name ... https://docs.microsoft.com CREATE TABLE (Transact-SQL) - SQL Server - Microsoft Docs
Simple CREATE TABLE Syntax (common if not using options) .... 為索引的索引鍵資料行，或任何PRIMARY KEY 或UNIQUE 條件約束的一部分。 https://docs.microsoft.com How can I create a unique constraint on my column (SQL Server 2008 ...
Set column as unique in SQL Server from the GUI: ... Make sure your column does not violate the unique constraint before you begin. https://stackoverflow.com SQL Server: Unique Constraints - TechOnTheNet
This SQL Server tutorial explains how to create, add, and drop unique ... A unique constraint is a single field or combination of fields that uniquely defines a record. ... to create. column1, column2... https://www.techonthenet.com SQL UNIQUE Constraint - W3Schools
The following SQL creates a UNIQUE constraint on the "ID" column when the "Persons" table is created: SQL Server / Oracle / MS Access: CREATE TABLE ... https://www.w3schools.com SQL UNIQUE Constraint 限制- SQL 語法教學Tutorial
UNIQUE 唯一限制(SQL UNIQUE Constraint). UNIQUE 用來保證欄位在資料表中的唯一性，約束資料表中的欄位不能有重複的 ... SQL Server / Oracle / MS Access https://www.fooish.com 唯一條件約束與檢查條件約束- SQL Server | Microsoft Docs
UNIQUE 和CHECK 是兩種類型的條件約束，可用來強制執行SQL ServerSQL .... CREATE TABLE CheckTbl (col1 int, col2 int); GO CREATE ... https://docs.microsoft.com 建立唯一的條件約束- SQL Server | Microsoft Docs
TransactionHistoryArchive4 ( TransactionID int NOT NULL, CONSTRAINT AK_TransactionID UNIQUE(TransactionID) ); GO ... https://docs.microsoft.com 建立唯一索引- SQL Server | Microsoft Docs
UnitMeasure table using the Name column. CREATE UNIQUE INDEX AK_UnitMeasure_Name ON Production.UnitMeasure (Name); GO. https://docs.microsoft.com |