When you create a table, you can define a column in the table to be an identity column. For example, create a table ORDERS with three columns called ORDERNO, SHIPPED_TO, and ORDER_DATE. Define ORDERNO as an identity column. CREATETABLE ORDERS (ORDERNOSMALLINT NOT NULL GENERATED ALWAYS A...
identity_col NUMBER ); 创建嵌套表并使用对象类型作为列的数据类型: 代码语言:txt 复制 CREATE TABLE nested_table ( id NUMBER, person person_type ) NESTED TABLE person STORE AS person_nested_table; 在上面的示例中,我们定义了一个名为person_type的对象类型,其中包含id、name和identity_col三个列。然后...
建立資料表中的識別欄位。 這個屬性會搭配 CREATE TABLE 和 ALTER TABLE Transact-SQL 陳述式使用。注意 IDENTITY 屬性與公開數據行之數據列識別屬性的 SQL-DMO Identity 屬性不同。Transact-SQL 語法慣例Syntaxsyntaxsql 複製 IDENTITY [ (seed , increment) ] ...
when you insert a new row into the table. The following, create table statement marks PersonId as an identity column with seed = 1 and Identity Increment = 1. Seed and Increment values are optional. If you don't specify the identity and seed they both default to 1...
Indicates that the new column is an identity column. When a new row is added to the table, SQL Server Compact provides a unique, incremental value for the column. Identity columns are generally used in conjunction with PRIMARY KEY constraints to serve as the unique row identifier for the tabl...
[ WITH ( <table_option> [ ,...n ] ) ] [ ; ] <column_definition> ::=column_name <data_type> [ FILESTREAM ] [ COLLATE collation_name ] [ NULL | NOT NULL ] [ [ CONSTRAINT constraint_name ] DEFAULT constant_expression ] | [ IDENTITY [ ( seed ,increment ) ] [ NOT FOR ...
<column_set_definition> ::= column_set_name XML COLUMN_SET FOR ALL_SPARSE_COLUMNS <table_constraint> ::= [ CONSTRAINT constraint_name ] { { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] ( column_name [ ASC | DESC ] [ ,... n ] ) [ WITH FILLFACTOR = fillfactor | WITH (...
CREATETABLE[dbo].[Table_1]([c1][int]IDENTITY(1,1),[c2][int]NULL,[ROWGUID][uniqueidentifier]NOTNULL,[rowguid4][uniqueidentifier]ROWGUIDCOLNOTNULL,CONSTRAINT[PK_Table_1]PRIMARYKEYCLUSTERED([c1]ASC)WITH(PAD_INDEX=OFF, STATISTICS_NORECOMPUTE=OFF, IGNORE_DUP_KEY=OFF, ALLOW_ROW_LOCKS=ON, ALLOW...
第十四章 SQL命令 CREATE TABLE(一) 创建表 大纲 CREATE [GLOBAL TEMPORARY] TABLE table (table-element-commalist) [shard-key] [WITH table-option-commalist] table-element ::= [%DESCRIPTION string] [%FILE string] [{%EXTENTSIZE | %NUMROWS} integer] ...
You need to setup SQL Server 2012 and create a test database. Then create a table with auto identity column: SQL createtableMyTestTable(IdintIdentity(1,1), Namevarchar(255)); Now insert 2 rows there: SQL insertintoMyTestTable(Name)values('Mr.Tom');insertintoMyTestTable(Name)values('Mr...