作者:mobiledu2502927877 | 来源:互联网 | 2023-01-29 04:43
SELECT表名casewhena.colorder1thend.nameelseend,索引j.name,表数据行数o.hs,表说明casewhena.colorder1then
SELECT
表名 = case when a.colorder=1 then d.name else '' end,
索引 = j.name,
表数据行数 = o.hs,
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 '√' else '' 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 '√'else '' 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=&#39;U&#39; and d.name<>&#39;dtproperties&#39;
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
left join
(select a.name ,b.rows as hs
from sysobjects a inner join sysindexes b
on a.id = b.id
where a.type = &#39;u&#39;
and b.indid in (0,1)
) o
on (d.name = o.name)
left join sys.objects as h
on d.name=h.name
left join sys.indexes as j on h.object_id=j.object_id
where h.type<>&#39;s&#39;
order by
a.id,a.colorder
---------------------------------------------------以上是sqlserver------------------------------------------------------------
SELECT
d.TABLE_NAME tbName ,
COALESCE(t.COMMENTS, &#39; &#39;) tbDesc,
a.COLUMN_NAME columnName,
a.DATA_TYPE columnType,
a.DATA_LENGTH width,
a.DATA_SCALE precision,
d.NUM_ROWS,
decode(a.NULLABLE,&#39;Y&#39;,&#39;0&#39;,&#39;1&#39;) notNull,
COALESCE(m.COMMENTS, &#39; &#39;) comments,
decode(k.uniqueness,&#39;UNIQUE&#39;,&#39;1&#39;,&#39;0&#39;) uniques,
COALESCE(k.index_name, &#39; &#39;) indexName,
decode(k.key,&#39;Y&#39;,&#39;1&#39;,&#39;0&#39;) masterKey
FROM
user_tab_columns a
INNER JOIN user_tables d on a.TABLE_NAME=d.TABLE_NAME
LEFT JOIN user_tab_comments t ON t.TABLE_NAME=d.TABLE_NAME
LEFT JOIN user_col_comments m ON m.COLUMN_NAME=a.COLUMN_NAME AND m.TABLE_NAME=d.TABLE_NAME
LEFT JOIN
(
SELECT e.index_name,u.TABLE_NAME,u.COLUMN_NAME,e.uniqueness,decode(p.constraint_name,NULL,&#39;N&#39;,&#39;Y&#39;) key
from user_indexes e INNER JOIN user_ind_columns u ON e.index_name=u.index_name
LEFT JOIN ( select constraint_name from user_constraints where constraint_type=&#39;P&#39; ) p ON e.index_name=p.constraint_name
) k ON k.TABLE_NAME=a.TABLE_NAME and k.COLUMN_NAME=a.COLUMN_NAME
ORDER BY tbName
---------------------------------------------------以上是oracle------------------------------------------------------------
SELECT
(case ORDINAL_POSITION when 1 then TABLE_NAME ELSE &#39;&#39; end ) &#39;库名&#39;,
ORDINAL_POSITION AS &#39;列的排列顺序&#39;,
COLUMN_COMMENT AS &#39;注释&#39;,
COLUMN_NAME AS &#39;列名&#39;,
IS_NULLABLE AS &#39;是否为空&#39;,
DATA_TYPE AS &#39;数据类型&#39;,
CHARACTER_MAXIMUM_LENGTH AS &#39;字符最大长度&#39;,
COLUMN_DEFAULT AS &#39;默认值&#39;,
NUMERIC_PRECISION AS &#39;数值精度(最大位数)&#39;,
NUMERIC_SCALE AS &#39;小数精度&#39;,
COLUMN_TYPE AS 列类型,
COLUMN_KEY &#39;KEY&#39;,
EXTRA AS &#39;额外说明&#39;
FROM
information_schema.`COLUMNS`
WHERE
TABLE_SCHEMA = &#39;ceshi&#39; (ceshi替换为库名即可)
ORDER BY
TABLE_NAME,
ORDINAL_POSITION;
---------------------------------------------------以上是mysql------------------------------------------------------------