Firebird SQL 获取系统数据(转)

 一、分页写法小例：

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


二、show

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

 

四、--更新字段注释

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


五、--显示字段注释

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

六、--更新表注释

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

七、--查询所有的表和视图（包括系统表和系统视图）

    SELECT RDB$RELATION_NAME FROM RDB$RELATIONS;
     
八、--查询所有的用户表和用户视图
     
    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

    SELECT a.RDB$RELATION_NAME, b.RDB$FIELD_NAME, b.RDB$FIELD_ID, d.RDB$TYPE_NAME,
    c.RDB$FIELD_LENGTH, c.RDB$FIELD_SCALE
    FROM RDB$RELATIONS a
    INNER JOIN RDB$RELATION_FIELDS b
    ON a.RDB$RELATION_NAME = b.RDB$RELATION_NAME
    INNER JOIN RDB$FIELDS c
    ON b.RDB$FIELD_SOURCE = c.RDB$FIELD_NAME
    INNER JOIN RDB$TYPES d
    ON c.RDB$FIELD_TYPE = d.RDB$TYPE
    WHERE a.RDB$SYSTEM_FLAG = 0
    AND d.RDB$FIELD_NAME = 'RDB$FIELD_TYPE'
    ORDER BY a.RDB$RELATION_NAME, b.RDB$FIELD_ID

十一、查找某表的所有字段及相关定义

    SELECT A.RDB$FIELD_NAME, B.RDB$FIELD_TYPE, B.RDB$FIELD_LENGTH, B.RDB$FIELD_PRECISION, B.RDB$FIELD_SCALE
    FROM RDB$RELATION_FIELDS A, RDB$FIELDS B
    WHERE A.RDB$RELATION_NAME = 'tablename'
    AND A.RDB$FIELD_SOURCE = B.RDB$FIELD_NAME
    ORDER BY A.RDB$FIELD_POSITION
十二、查找某表的主键定义字段

    select A.RDB$FIELD_NAME FROM RDB$INDEX_SEGMENTS A, RDB$RELATION_CONSTRAINTS B
    WHERE B.RDB$CONSTRAINT_TYPE = 'PRIMARY KEY'
    AND B.RDB$RELATION_NAME = 'tablename'
    AND A.RDB$INDEX_NAME = B.RDB$INDEX_NAME
    ORDER BY A.RDB$FIELD_POSITION
十三、查找某表的外键定义

    select r1.RDB$CONSTRAINT_NAME, rind.RDB$FIELD_NAME, r2.RDB$RELATION_NAME
    FROM RDB$RELATION_CONSTRAINTS r1, RDB$RELATION_CONSTRAINTS r2, RDB$REF_CONSTRAINTS ref, RDB$INDEX_SEGMENTS rind
    where r1.RDB$RELATION_NAME = 'tablename'
    and r1.RDB$CONSTRAINT_TYPE = 'FOREIGN KEY'
    and r1.RDB$CONSTRAINT_NAME = ref.RDB$CONSTRAINT_NAME
    and ref.RDB$CONST_NAME_UQ = r2.RDB$CONSTRAINT_NAME
    and r1.RDB$INDEX_NAME = rind.RDB$INDEX_NAME
   
十四  获取用户表的所有字段

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