資料庫結構比較的sql 語句
sql server
chk_collist_mssql
select sysobjects.name + '.' + syscolumns.name , systypes.name ,
syscolumns.length ,
case syscolumns.isnullable
when 1 then 'y'
when 0 then 'n'
end
from sysobjects , syscolumns ,systypes
where sysobjects.xtype ='u' and
sysobjects.id= syscolumns.id and
systypes.xtype = syscolumns.xtype
order by sysobjects.name , syscolumns.name ;
chk_cons_mssql
select distinct
convert(varchar(30),sysobjects_1.name) as table_name,
convert(varchar(30),syscolumns.name) as column_name,
sysindexkeys.keyno as position,
case sysobjects.xtype
when 'pk' then 'p'
when 'f' then 'r'
when 'c' then 'c'
when 'uq' then 'u'
when 'd' then 'c'
end as constraint_type
from dbo.sysobjects inner join
dbo.sysobjects sysobjects_1 on
dbo.sysobjects.parent_obj = sysobjects_1.id inner join
dbo.syscolumns on sysobjects_1.id = dbo.syscolumns.id inner join
dbo.sysindexkeys on dbo.syscolumns.id = dbo.sysindexkeys.id and
dbo.syscolumns.colid = dbo.sysindexkeys.colid
where (sysobjects.xtype in ('c', 'f', 'pk', 'uq', 'd')) and
(sysobjects.status & 64 = 0) ;
chk_idx_collist_mssql
select dbo.sysindexes.name ,sysobjects.name + '.' + syscolumns.name
from dbo.syscolumns inner join
dbo.sysindexkeys inner join
dbo.sysindexes on dbo.sysindexkeys.id = dbo.sysindexes.id on
dbo.syscolumns.colid = dbo.sysindexkeys.colid and
dbo.syscolumns.id = dbo.sysindexkeys.id inner join
dbo.sysobjects on dbo.sysindexes.id = dbo.sysobjects.id
where (dbo.sysobjects.xtype = 'u') and (dbo.sysindexes.indid > 0) and
(dbo.sysindexes.indid < 255)
order by dbo.sysobjects.name, dbo.syscolumns.name ;
oracle
chk_collist_oracle
select a.table_name||'.'||b.column_name,b.data_type,b.data_length,b.nullable
from user_tables a, user_tab_columns b
where a.table_name=b.table_name
order by a.table_name,b.column_name;
chk_cons_oracle
select distinct a.table_name,b.column_name,nvl(b.position,1) position,a.constraint_type
from user_constraints a,user_cons_columns b
where a.table_name=b.table_name and a.constraint_name=b.constraint_name
order by a.table_name,position;
chk_idx_collist_oracle
select index_name,table_name||'.'||column_name
from user_ind_columns
order by table_name,column_name;
以上是兩個一樣的資料庫進行差異比較用的sql
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