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
显示表名和表结构
SHOW TABLES; SHOW TABLE tablename;
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‘;
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‘)
显示字段注释
SELECT RDB$FIELD_NAME,RDB$DESCRIPTION FROM RDB$RELATION_FIELDS WHERE (RDB$RELATION_NAME = ‘SHOP‘) AND (DB$FIELD_NAME = ‘CREDIT_BUY‘)
更新表注释
UPDATE RDB$RELATIONS SET RDB$DESCRIPTION = ‘描述信息‘ WHERE RDB$RELATION_NAME = ‘TABLE_NAME‘;
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;
查询所有的用户表和用户视图
SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$SYSTEM_FLAG = 0;
查询所有的用户表
SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$SYSTEM_FLAG = 0 AND RDB$VIEW_BLR IS NULL;
查所有用户表、用户视图所有字段及相关定义
SELECT a.RDB$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;
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$FIELD_POSITION;
查找某表的主键定义字段
SELECT A.RDB$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$FIELD_POSITION;
查找某表的外键定义
SELECT r1.RDB$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;
时间: 2024-10-16 10:30:39