SQL中object_id函数的用法
在列出表中所有字段名的时候,用到了这样一个SQL函数:object_id这里我将其作用与用法列出来,好让大家明白:
OBJECT_ID:
返回数据库对象标识号。
语法
OBJECT_ID ( 'object' )
参数
'object'
要使用的对象。object 的数据类型为 char 或 nchar。如果 object 的数据类型是 char,那么隐性将其转换成 nchar。
返回类型
int
注释
当该参数对系统函数可选时,则系统采用当前数据库、主机、服务器用户或数据库用户。内置函数后面必须跟圆括号。
如果指定一个临时表名,则必须在临时表名前面加上数据库名,例如:
SELECT OBJECT_ID('tempdb..#mytemptable')
系统函数可以在选择列表、WHERE 子句和任何允许使用表达式的地方使用。有关更多信息,请参见表达式和 WHERE。
示例
下面的示例为 pubs 数据库中的 authors 表返回对象 ID。
USE master
SELECT OBJECT_ID('pubs..authors')
下面是结果集:
-----------
1977058079
(1 row(s) affected)

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