–1. IDENTIY 列不能为空,不能设默认值,创建后不能使用ALTER TABLE TableName ALTER COLUMN修改,每张表只能有一个自增列 –2. 查看当前值:SELECT IDENT_CURRENT(‘TableName’), — 查看增量值:SELECT IDENT_INCR(‘TableName’) — 查看原始种子值:SELECT IDENT_SEED(‘TableName’),起始值, TRUNCATE TAB...
NAME='Accounting',--数据库名称FILENAME='C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\AccountingData.mdf',--数据库文件位置SIZE=10, --大小 10MMAXSIZE=50,--最大大小 50MFILEGROWTH=5--每次增加 5M)LOGON( NAME='AccountingLog', FILENAME='C:\Program Files\Microsoft SQL...
The following example creates a table with an identity column and shows how the SET IDENTITY_INSERT setting can be used to fill a gap in the identity values caused by a DELETE statement. SQL Copy USE AdventureWorks2022; GO Create tool table. SQL Copy ...
在SQL Server企业管理器中新建一个查询,并确保服务器里有一个原封不动的TSQL2012数据库的副本。在这个练习中,你创建了一个额外的表,并把它放入TSQL2012数据库。 CREATE the table with one column. Execute the following statements in order to create your copy of the original table, but just one column...
CREATETABLE[database_name.[owner].]table_name ( <columnname><data type> [[DEFAULT <constant expression>]|[IDENTITY [(seed, increment) [NOT FOR REPLICATION]]] [ROWGUIDCOL] [COLLATE <collation name>] {[NULL|NOT NULL]|[PRIMARY KEY | UNIQUE]} [...
syntaxsql复制 -- Create a new table.CREATETABLE{database_name.schema_name.table_name|schema_name.table_name|table_name} ( {column_name<data_type>[<column_options>] } [ ,...n ] ) [WITH(<table_option>[ ,...n ] ) ] [;]<column_options>::=[COLLATEWindows_collation_name] [NULL|...
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 the end. This makes it really easy in other tables to know the table that a foreign key will reference....
本文详细介绍了T-SQL中的INSERT、UPDATE、DELETE和SELECT语句的语法及示例,涵盖了单条和批量数据插入、数据更新、删除操作以及复杂查询技巧,包括嵌套查询、联接查询和结果集组合等,帮助读者掌握数据库操作的基本方法和高级应用。
{ ALWAYS | BY DEFAULT } <alter identity column option> ::= <alter sequence generator restart option> | SET <basic sequence generator option> ... Conformance Rules: Without Feature T178, "Identity columns: simple restart option", in conforming SQL language, an <alter sequence generat...
►anonymous_namespace{sql_table.cc} ►anonymous_namespace{sql_tablespace.cc} ►anonymous_namespace{sys_vars.cc} ►anonymous_namespace{table_stats.cc} ►anonymous_namespace{tls_server_context.cc} ►anonymous_namespace{uniques.cc} ►auth_kerberos_context ►auth_ldap_sasl_client ►aut...