Firebird常用系统表Sql语句

--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;