oracle mysql SqlServer 元数据查询sql
oracle mysql SqlServer 元数据查询sql
Sqlserver:
查询所有表名 和表信息
如下：
SELECT
表名 = d.name,--case when a.colorder=1 then d.name else '' end,
表说明 = case when a.colorder=1 then isnull(f.value,'') else '' end,
字段序号 = a.colorder,
字段名 = a.name,
标识 = case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end,
主键 = case when exists(SELECT 1 FROM sysobjects where xtype='PK' and parent_obj=a.id and name in (
SELECT name FROM sysindexes WHERE indid in(
SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid))) then 'Y' else 'N' end,
类型 = b.name,
占用字节数 = a.length,
长度 = COLUMNPROPERTY(a.id,a.name,'PRECISION'),
小数位数 = isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
允许空 = case when a.isnullable=1 then 'Y'else 'N' end,
默认值 = isnull(e.text,''),
字段说明 = isnull(g.[value],'')
FROM
syscolumns a
left join
systypes b
on
a.xusertype=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
sys.extended_properties g
on
a.id=g.major_id and a.colid=g.minor_id
left join
sys.extended_properties f
on
d.id=f.major_id and f.minor_id=0
order by
a.id,a.colorder
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原文链接：https://blog.csdn.net/qq_37655399/article/details/108452938
mysql:
select
'系统名自定义' as Owner,
'mysql' as source ,
a.TABLE_SCHEMA as Table_Schema,
a.TABLE_NAME as TableName,
b.TABLE_COMMENT as Table_Comment,
a.COLUMN_NAME as ColumnName ,
a.COLUMN_COMMENT as Column_Comment,
a.DATA_TYPE as DataType,
a.CHARACTER_MAXIMUM_LENGTH as LENGTH ,
a.NUMERIC_PRECISION as Numeric_Precision,
a.NUMERIC_SCALE as Scale,
'' as Column_Id,
a.COLUMN_KEY as Is_Primary_Key,
'' as Is_Partition_Key,
'' as Is_Subpartition_Key,
a.ORDINAL_POSITION as Column_Position,
case when a.IS_NULLABLE = 'YES' then 'Y' else 'N' end as Nullable
-- a.IS_NULLABLE as Nullable -- (case when a.IS_NULLABLE = 'YES' then '1' else '0') end
FROM
information_schema.COLUMNS AS a
LEFT JOIN
information_schema.TABLES AS b
ON
a.TABLE_NAME=b.TABLE_NAME
AND a.TABLE_SCHEMA=b.TABLE_SCHEMA
where b.TABLE_TYPE='BASE TABLE'
and b.table_schema in ('数据库名')
```sql
oracle 最新
select
DISTINCT (o.OWNER||o.TABLE_NAME||o.COLUMN_NAME) as disflag,
CASE WHEN o.OWNER = 'WXNHW' THEN 'sdpw' WHEN o.OWNER = 'BZ_EBIZ' THEN 'sdhx' ELSE '' END as Owner,
'oracle' as source,
o.OWNER as Table_Schema,
o.TABLE_NAME as TableName,
o.tab_comments as Table_Comment,
o.COLUMN_NAME as ColumnName ,
o.comments as Column_Comment,
o.DATA_TYPE as DataType,
o.DATA_LENGTH as LENGTH ,
o.DATA_PRECISION as NUMERIC_PRECISION,
o.DATA_SCALE as Scale,
'' as Column_Id,
o.IS_PRIMARY_KEY as Is_Primary_Key,
o.IS_PARTITION_KEY as Is_Partition_Key,
'' as Is_Subpartition_Key,
o.COLUMN_ID as Column_Position,
o.NULLABLE as Nullable
FROM
(select m.*,n.tab_comments from
(select a.OWNER,a.table_name,b.comments as tab_comments from all_tables a ，all_tab_comments b
where a.OWNER in ('库名1','库名2')
and b.OWNER = a.OWNER
and a.table_name = b.table_name
) n,
(select c.*,d.comments ,
CASE WHEN c.column_name = e.column_name THEN 'Y' ELSE 'N' END AS IS_PRIMARY_KEY,
CASE WHEN c.column_name = g.column_name THEN 'Y' ELSE 'N' END AS IS_PARTITION_KEY
from all_tab_columns c
left join all_col_comments d
on c.OWNER = d.OWNER and c.TABLE_NAME = d.table_name and c.COLUMN_NAME = d.column_name
left join dba_cons_columns e
ON c.OWNER = e.OWNER and c.table_name = e.TABLE_NAME and c.column_name= e.column_name and e.position is not null
left join dba_constraints f
on e.constraint_name = f.constraint_name and f.constraint_type ='P' and f.owner = e.OWNER and f.table_name = e.TABLE_NAME
left join DBA_PART_KEY_COLUMNS g
on g.OBJECT_TYPE ='TABLE'
and c.OWNER = g.OWNER and c.table_name=g.NAME
where c.owner in ('库名1','库名2')
) m
where n.owner = m.owner and n.table_name = m.table_name) o
order by o.owner,o.TABLE_NAME , o.COLUMN_ID
oracle：
```sql
select
CASE WHEN o.OWNER = '数据库' THEN '系统名' WHEN o.OWNER = '数据库' THEN '系统名' ELSE '' END as Owner,
'oracle' as source,
o.OWNER as Table_Schema,
o.TABLE_NAME as TableName,
o.tab_comments as Table_Comment,
o.COLUMN_NAME as ColumnName ,
o.comments as Column_Comment,
o.DATA_TYPE as DataType,
o.DATA_LENGTH as LENGTH ,
o.DATA_PRECISION as NUMERIC_PRECISION,
o.DATA_SCALE as Scale,
'' as Column_Id,
o.IS_PRIMARY_KEY as Is_Primary_Key,
o.IS_PARTITION_KEY as Is_Partition_Key,
'' as Is_Subpartition_Key,
o.COLUMN_ID as Column_Position,
o.NULLABLE as Nullable
FROM
(select m.*,n.tab_comments from
(select a.OWNER,a.table_name,b.comments as tab_comments from all_tables a ，all_tab_comments b
where a.OWNER in ('数据库名')
and b.OWNER = a.OWNER
and a.table_name = b.table_name
) n,
(select c.*,d.comments ,
CASE WHEN c.column_name = TABLE_CONSTRAINT.column_name THEN 'Y' ELSE 'N' END AS IS_PRIMARY_KEY,
CASE WHEN c.column_name = TABLE_PART_KEY.column_name THEN 'Y' ELSE 'N' END AS IS_PARTITION_KEY
from (select * from all_tab_columns where owner in ('数据库名')) c
left join (select table_name ,column_name,owner ,comments from all_col_comments ) d
on c.OWNER = d.OWNER and c.TABLE_NAME = d.table_name and c.COLUMN_NAME = d.column_name
left join ( select table_name ,column_name,owner from dba_cons_columns where constraint_name in
( select constraint_name from dba_constraints WHERE constraint_type ='P')and owner = dba_cons_columns.OWNER and table_name = dba_cons_columns.TABLE_NAME)) TABLE_CONSTRAINT
ON c.OWNER = TABLE_CONSTRAINT.OWNER and c.table_name = TABLE_CONSTRAINT.TABLE_NAME and c.column_name= TABLE_CONSTRAINT.column_name
left join(SELECT NAME, COLUMN_NAME ,owner FROM DBA_PART_KEY_COLUMNS where OBJECT_TYPE ='TABLE')TABLE_PART_KEY
ON c.OWNER = TABLE_PART_KEY.OWNER and c.table_name=TABLE_PART_KEY.NAME
) m
where n.owner = m.owner and n.table_name = m.table_name) o
order by o.owner,o.TABLE_NAME , o.COLUMN_ID