--得到数据库的所有者名称 SELECT distinct RDB$OWNER_NAME AS DATABASE_OWNER FROM RDB$RELATIONS WHERE (RDB$SYSTEM_FLAG = 1); --根据表名得到表的主键 SELECT RC.RDB$CONSTRAINT_NAME AS CONSTRAINT_NAME, I.RDB$RELATION_NAME AS TABLE_NAME, S.RDB$FIELD_NAME AS COLUMN_NAME FROM RDB$RELATION_CONSTRAINTS RC LEFT JOIN RDB$INDICES I ON
(I.RDB$INDEX_NAME = RC.RDB$INDEX_NAME) LEFT JOIN RDB$INDEX_SEGMENTS S ON (S.RDB$INDEX_NAME = I.RDB$INDEX_NAME) WHERE (RC.RDB$CONSTRAINT_TYPE = 'PRIMARY KEY') AND (I.RDB$RELATION_NAME = 'COUNTRY') ---根据表名得到其相关的依赖. SELECT RDB$DEPENDENT_NAME AS DEPENDENT_NAME, RDB$DEPENDED_ON_NAME AS DEPENDS_ON, RDB$FIELD_NAME AS FIELD_NAME, RDB$DEPENDENT_TYPE DEPENDENT_TYPE, CASE WHEN RDB$DEPENDENT_TYPE = 0 THEN 'TABLE' WHEN RDB$DEPENDENT_TYPE = 1 THEN 'VIEW' WHEN RDB$DEPENDENT_TYPE = 2 THEN 'TRIGGER' WHEN RDB$DEPENDENT_TYPE = 3 THEN 'COMPUTED' WHEN RDB$DEPENDENT_TYPE = 4 THEN 'VALIDATION' WHEN RDB$DEPENDENT_TYPE = 5 THEN 'PROCEDURE' WHEN RDB$DEPENDENT_TYPE = 6 THEN 'expression_r_INDEX' WHEN RDB$DEPENDENT_TYPE = 7 THEN 'EXCEPTION' WHEN RDB$DEPENDENT_TYPE = 8 THEN 'USER' WHEN RDB$DEPENDENT_TYPE = 9 THEN 'FIELD' WHEN RDB$DEPENDENT_TYPE = 10 THEN 'INDEX' WHEN RDB$DEPENDENT_TYPE = 14 THEN 'GENERATOR' ELSE 'UNKNOWN' END AS DEPENDENT_TYPE_STR, RDB$DEPENDED_ON_TYPE AS DEPEND_ON_TYPE, CASE WHEN RDB$DEPENDED_ON_TYPE = 0 THEN 'TABLE' WHEN RDB$DEPENDED_ON_TYPE = 1 THEN 'VIEW' WHEN RDB$DEPENDED_ON_TYPE = 2 THEN 'TRIGGER' WHEN RDB$DEPENDED_ON_TYPE = 3 THEN 'COMPUTED' WHEN RDB$DEPENDED_ON_TYPE = 4 THEN 'VALIDATION' WHEN RDB$DEPENDED_ON_TYPE = 5 THEN 'PROCEDURE' WHEN RDB$DEPENDED_ON_TYPE = 6 THEN 'expression_r_INDEX' WHEN RDB$DEPENDED_ON_TYPE = 7 THEN 'EXCEPTION' WHEN RDB$DEPENDED_ON_TYPE = 8 THEN 'USER' WHEN RDB$DEPENDED_ON_TYPE = 9 THEN 'FIELD' WHEN RDB$DEPENDED_ON_TYPE = 10 THEN 'INDEX' WHEN RDB$DEPENDED_ON_TYPE = 14 THEN 'GENERATOR' ELSE 'UNKNOWN' END AS DEPENDS_ON_TYPE_STR FROM RDB$DEPENDENCIES WHERE RDB$DEPENDED_ON_NAME='JOB' ORDER BY RDB$DEPENDENT_NAME --根据索引名得到表名和与及其索引相关的列 SELECT I.RDB$RELATION_NAME AS TABLENAME, S.RDB$FIELD_NAME AS FIELDNAME FROM RDB$INDICES I LEFT JOIN RDB$INDEX_SEGMENTS S ON (S.RDB$INDEX_NAME = I.RDB$INDEX_NAME) WHERE (I.RDB$INDEX_NAME = 'NAMEX'); --根据表名得到其上所有的索引 SELECT I.RDB$INDEX_NAME AS FKINDEXNAME, I.RDB$RELATION_NAME AS TABLENAME, S.RDB$FIELD_NAME AS FIELDNAME FROM RDB$INDICES I LEFT JOIN RDB$INDEX_SEGMENTS S ON (S.RDB$INDEX_NAME = I.RDB$INDEX_NAME) WHERE I.RDB$RELATION_NAME = 'CUSTOMER' AND (NOT EXISTS(SELECT 1 FROM RDB$RELATION_CONSTRAINTS R WHERE R.RDB$INDEX_NAME = I.RDB$INDEX_NAME)) --得到所有的用户表 SELECT RDB$RELATION_NAME AS TABLE_NAME FROM RDB$RELATIONS WHERE RDB$SYSTEM_FLAG = 0 AND RDB$VIEW_SOURCE IS NULL; --根据表名与字段得到索引 SELECT I.RDB$INDEX_NAME AS FKINDEXNAME, I.RDB$RELATION_NAME AS TABLENAME, S.RDB$FIELD_NAME AS FIELDNAME FROM RDB$INDICES I LEFT JOIN RDB$INDEX_SEGMENTS S ON (S.RDB$INDEX_NAME = I.RDB$INDEX_NAME) WHERE I.RDB$FOREIGN_KEY IS NOT NULL AND I.RDB$RELATION_NAME = 'CUSTOMER' AND S.RDB$FIELD_NAME = 'COUNTRY'; --根据表名得到列信息 SELECT RF.RDB$FIELD_NAME AS FieldName, T.RDB$TYPE_NAME AS DataType, F.RDB$FIELD_LENGTH AS FieldLength, RF.RDB$NULL_FLAG AS AllowNulls, CS.RDB$DEFAULT_COLLATE_NAME AS CharacterSet, RF.RDB$DEFAULT_SOURCE AS Defaultvalue , F.RDB$COMPUTED_SOURCE AS ComputedSource, F.RDB$FIELD_SUB_TYPE AS SubType, F.RDB$FIELD_PRECISION AS FieldPrecision FROM RDB$RELATION_FIELDS RF LEFT JOIN RDB$FIELDS F ON (F.RDB$FIELD_NAME = RF.RDB$FIELD_SOURCE) LEFT JOIN RDB$TYPES T ON (T.RDB$TYPE = F.RDB$FIELD_TYPE) LEFT JOIN RDB$CHARACTER_SETS CS ON (CS.RDB$CHARACTER_SET_ID = F.RDB$CHARACTER_SET_ID) WHERE RF.RDB$RELATION_NAME = 'EMPLOYEE' AND T.RDB$FIELD_NAME = 'RDB$FIELD_TYPE' ORDER BY RF.RDB$FIELD_POSITION; --检测一个列是否存在,结果为1存在,不为1不存在 SELECT COUNT(RF.RDB$FIELD_NAME) FROM RDB$RELATION_FIELDS RF LEFT JOIN RDB$FIELDS F ON (F.RDB$FIELD_NAME = RF.RDB$FIELD_SOURCE) LEFT JOIN RDB$TYPES T ON (T.RDB$TYPE = F.RDB$FIELD_TYPE) WHERE RF.RDB$RELATION_NAME = 'EMPLOYEE' AND T.RDB$FIELD_NAME = 'RDB$FIELD_TYPE' AND RF.RDB$FIELD_NAME = 'EMP_NO' --检测一个表是否存在 SELECT COUNT(RDB$RELATION_NAME) FROM RDB$RELATIONS WHERE (RDB$RELATION_NAME = 'CUSTOMER') AND RDB$VIEW_SOURCE IS NULL; --得到数据库中所有的视图 SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$FLAGS = 1 AND RDB$VIEW_SOURCE IS NOT NULL; --得到所有的系统表 SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE (RDB$FLAGS = 0 OR RDB$FLAGS IS NULL) AND RDB$VIEW_SOURCE IS NULL;
