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看到书中有下面这句话：
在定义一个视图时， 我们只是把其定义存放在系统的数据字典中？
请问数据字典在哪里？
SELECT
(case when a.colorder=1 then d.name else end) N表名,
a.colorder N字段序号,
a.name N字段名,
(case when COLUMNPROPERTY( a.id,a.name,IsIdentity)=1 then √else end) N标识,
(case when (SELECT count(*)
FROM sysobjects
WHERE (name in
(SELECT name
FROM sysindexes
WHERE (id = a.id) AND (indid in
(SELECT indid
FROM sysindexkeys
WHERE (id = a.id) AND (colid in
(SELECT colid
FROM syscolumns
WHERE (id = a.id) AND (name = a.name))))))) AND
(xtype = PK))>0 then √ else end) N主键,
b.name N类型,
a.length N占用字节数,
COLUMNPROPERTY(a.id,a.name,PRECISION) as N长度,
isnull(COLUMNPROPERTY(a.id,a.name,Scale),0) as N小数位数,
(case when a.isnullable=1 then √else end) N允许空,
isnull(e.text,) N默认值,
isnull(g.[value],) AS N字段说明
--into ##tx
FROM syscolumns a left join systypes b
on a.xtype=b.xusertype
inner join sysobjects d
on a.id=d.id and d.xtype=U and d.name<>dtproperties
left join syscomments e
on a.cdefault=e.id
left join sysproperties g
on a.id=g.id AND a.colid = g.smallid
order by object_name(a.id),a.colorder
