firebird sql 常用语句

本文主要是介绍firebird sql 常用语句，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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、显示表名和表结构
　　SHOW TABLES;
SHOW TABLE tablename;

三、使用ISQL连接数据库
firebird%92bin>isql -u sysdba -p masterkey
  SQL>CONNECT 'E:companyxmwsoftnewxmwsoftc2dbcts2.fdb';
或
SQL>CONNECT 'E:%92'
CON>USER 'sysdba'
CONT>PASSWORD 'masterkey';

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 (DB$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;