Firebird SQL 获取系统数据

一、分页写法小例：

1 select first 10 templateid,code,name from template ;
2 select first 10 skip 10 templateid,code,name from template ;
3 select * from shop rows 1 to 10; --firebird2.0支持这种写法

 

二、show

1 show tables;
2 show table tablename
3
4 三、
5
6 D:\firebird2\bin>isql -u sysdba -p masterkey
7 connect "E:\company\xmwsoft ewxmwsoft\c2\db\cts2.fdb";

 

四、--更新字段注释

1 update RDB$RELATION_FIELDS
2 set RDB$DESCRIPTION = '描述信息'
3 where (RDB$RELATION_NAME = 'SHOP') and
4 (RDB$FIELD_NAME = 'CREDIT_BUY')

五、--显示字段注释

1 select RDB$FIELD_NAME,RDB$DESCRIPTION from RDB$RELATION_FIELDS
2 where (RDB$RELATION_NAME = 'SHOP')
3 and
4 (RDB$FIELD_NAME = 'CREDIT_BUY')

六、--更新表注释

1 update RDB$RELATIONS set RDB$DESCRIPTION = '描述信息' whereRDB$RELATION_NAME='TABLE_NAME'

七、--查询所有的表和视图（包括系统表和系统视图）

1 SELECT RDB$RELATION_NAME FROM RDB$RELATIONS;

八、--查询所有的用户表和用户视图

5 SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$SYSTEM_FLAG = 0;

九、--查询所有的用户表

SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$SYSTEM_FLAG = 0 AND RDB$VIEW_BLR IS NULL

十、查所有用户表、用户视图所有字段及相关定义

01 SELECT a.RDB$RELATION_NAME, b.RDB$FIELD_NAME, b.RDB$FIELD_ID, d.RDB$TYPE_NAME,
02 c.RDB$FIELD_LENGTH, c.RDB$FIELD_SCALE
03 FROM RDB$RELATIONS a
04 INNER JOIN RDB$RELATION_FIELDS b
05 ON a.RDB$RELATION_NAME = b.RDB$RELATION_NAME
06 INNER JOIN RDB$FIELDS c
07 ON b.RDB$FIELD_SOURCE = c.RDB$FIELD_NAME
08 INNER JOIN RDB$TYPES d
09 ON c.RDB$FIELD_TYPE = d.RDB$TYPE
10 WHERE a.RDB$SYSTEM_FLAG = 0
11 AND d.RDB$FIELD_NAME = 'RDB$FIELD_TYPE'
12 ORDER BY a.RDB$RELATION_NAME, b.RDB$FIELD_ID

十一、查找某表的所有字段及相关定义

1 SELECT A.RDB$FIELD_NAME, B.RDB$FIELD_TYPE, B.RDB$FIELD_LENGTH, B.RDB$FIELD_PRECISION, B.RDB$FIELD_SCALE
2 FROM RDB$RELATION_FIELDS A, RDB$FIELDS B
3 WHERE A.RDB$RELATION_NAME = 'tablename'
4 AND A.RDB$FIELD_SOURCE = B.RDB$FIELD_NAME
5 ORDER BY A.RDB$FIELD_POSITION

十二、查找某表的主键定义字段

1 select A.RDB$FIELD_NAME FROM RDB$INDEX_SEGMENTS A, RDB$RELATION_CONSTRAINTS B
2 WHERE B.RDB$CONSTRAINT_TYPE = 'PRIMARY KEY'
3 AND B.RDB$RELATION_NAME = 'tablename'
4 AND A.RDB$INDEX_NAME = B.RDB$INDEX_NAME
5 ORDER BY A.RDB$FIELD_POSITION

十三、查找某表的外键定义

1 select r1.RDB$CONSTRAINT_NAME, rind.RDB$FIELD_NAME, r2.RDB$RELATION_NAME
2 FROM RDB$RELATION_CONSTRAINTS r1, RDB$RELATION_CONSTRAINTS r2, RDB$REF_CONSTRAINTS ref, RDB$INDEX_SEGMENTS rind
3 where r1.RDB$RELATION_NAME = 'tablename'
4 and r1.RDB$CONSTRAINT_TYPE = 'FOREIGN KEY'
5 and r1.RDB$CONSTRAINT_NAME = ref.RDB$CONSTRAINT_NAME
6 and ref.RDB$CONST_NAME_UQ = r2.RDB$CONSTRAINT_NAME
7 and r1.RDB$INDEX_NAME = rind.RDB$INDEX_NAME

十四  获取用户表的所有字段

1 SELECT RDB$FIELD_NAME FROM RDB$RELATION_FIELDS WHERERDB$RELATION_NAME ='[TABLE_NAME]'