SQL Server中Table字典數(shù)據(jù)的查詢SQL示例代碼

2024-08-31 01:05:27

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前言

在數(shù)據(jù)庫(kù)系統(tǒng)原理與設(shè)計(jì)（第3版）教科書(shū)中這樣寫(xiě)道：

數(shù)據(jù)庫(kù)包含4類(lèi)數(shù)據(jù)：

1.用戶數(shù)據(jù)

2.元數(shù)據(jù)

3.索引

4.應(yīng)用元數(shù)據(jù)

其中，元數(shù)據(jù)也叫數(shù)據(jù)字典，定義如下：

下面這篇文章就來(lái)給大家分享一個(gè)關(guān)于查詢SQL Server Table 結(jié)構(gòu)的SQL 語(yǔ)句。

T-SQL 如下：

SELECT (case when a.colorder=1 then d.name else '' end) 表名,a.colorder 字段序號(hào),a.name 字段名,(case when a.colorder=1 then isnull(f.value,'') else '' end) 表說(shuō)明, (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '1'else '0' end)標(biāo)識(shí),(case when (SELECT count(*) FROM sysobjectsWHERE (name in (SELECT name FROM sysindexesWHERE (id = a.id) AND (indid in(SELECT indid FROM sysindexkeysWHERE (id = a.id) AND (colid in(SELECT colid FROM syscolumns WHERE (id = a.id) AND (name = a.name)))))))AND (xtype = 'PK'))>0 then '1' else '0' end) 主鍵,b.name 類(lèi)型,a.length 占用字節(jié)數(shù),COLUMNPROPERTY(a.id,a.name,'PRECISION') as 長(zhǎng)度,isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小數(shù)位數(shù),(case whena.isnullable=1 then '1'else '0' end) 允許空,isnull(e.text,'') 默認(rèn)值,isnull(g.[value], ' ') AS [說(shuō)明]FROM syscolumns aleft join systypes b on a.xtype=b.xusertypeinner join sysobjects d on a.id=d.id and d.xtype='U' and d.name<>'dtproperties'left join syscomments e on a.cdefault=e.idleft join sys.extended_properties g on a.id=g.major_id AND a.colid=g.minor_idleft join sys.extended_properties f on d.id=f.major_id and f.minor_id=0--where b.name is not nullWHERE d.name='DBA_Server' --如果只查詢指定表,加上此條件，此案例為表DBA_Serverorder by a.id,a.colorder

查詢出的結(jié)果如下：

SQLServer,Table,字典數(shù)據(jù),SQL代碼