我该如何在oracle中删除所有用户表?
我遇到了约束的问题。即使我将所有约束都禁用了,仍然无法进行操作。
我遇到了约束的问题。即使我将所有约束都禁用了,仍然无法进行操作。
BEGIN
FOR cur_rec IN (SELECT object_name, object_type
FROM user_objects
WHERE object_type IN
('TABLE',
'VIEW',
'MATERIALIZED VIEW',
'PACKAGE',
'PROCEDURE',
'FUNCTION',
'SEQUENCE',
'SYNONYM',
'PACKAGE BODY'
))
LOOP
BEGIN
IF cur_rec.object_type = 'TABLE'
THEN
EXECUTE IMMEDIATE 'DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '" CASCADE CONSTRAINTS';
ELSE
EXECUTE IMMEDIATE 'DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '"';
END IF;
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ('FAILED: DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '"'
);
END;
END LOOP;
FOR cur_rec IN (SELECT *
FROM all_synonyms
WHERE table_owner IN (SELECT USER FROM dual))
LOOP
BEGIN
EXECUTE IMMEDIATE 'DROP PUBLIC SYNONYM ' || cur_rec.synonym_name;
END;
END LOOP;
END;
/
如果你只是想要一种真正简单的方法来做这件事... 这是我过去使用过的一个脚本
select 'drop table '||table_name||' cascade constraints;' from user_tables;
这将为模式中的所有表打印一系列删除命令。将此查询的结果存储到 Spool 中并执行它。
来源: https://forums.oracle.com/forums/thread.jspa?threadID=614090
同样,如果您想清除多个表格,可以编辑以下内容以满足您的需求。
select 'drop '||object_type||' '|| object_name || ';' from user_objects where object_type in ('VIEW','PACKAGE','SEQUENCE', 'PROCEDURE', 'FUNCTION', 'INDEX')
select 'drop table "'||table_name||'" cascade constraints;' from user_tables;
。 - MT0对我有用的另一个答案是(感谢http://snipt.net/Fotinakis/drop-all-tables-and-constraints-within-an-oracle-schema/)
BEGIN
FOR c IN (SELECT table_name FROM user_tables) LOOP
EXECUTE IMMEDIATE ('DROP TABLE "' || c.table_name || '" CASCADE CONSTRAINTS');
END LOOP;
FOR s IN (SELECT sequence_name FROM user_sequences) LOOP
EXECUTE IMMEDIATE ('DROP SEQUENCE ' || s.sequence_name);
END LOOP;
END;
请注意,此操作会在您运行它后立即生效。它不会产生需要在其他地方粘贴的脚本(如其他答案所示),而是直接在数据库上运行。
'DROP TABLE "' || c.table_name || '" CASCADE CONSTRAINTS'
来引用表名。如果表名是小写,则这是必要的。 - cevingDROP
语句的末尾添加PURGE
。 - Ruslanbegin
for i in (select 'drop table '||table_name||' cascade constraints' tbl from user_tables)
loop
execute immediate i.tbl;
end loop;
end;
最简单的方法是使用级联命令删除拥有这些对象的用户。
DROP USER username CASCADE
SELECT 'DROP TABLE "' || TABLE_NAME || '" CASCADE CONSTRAINTS;'
FROM user_tables;
user_tables
是包含用户所有表的系统表。SELECT子句将为每个表生成DROP语句。您可以运行该脚本。
user_tables
是一个系统表,其中包含了所有用户的表。SELECT语句将会为每个表生成一个DROP语句。您可以运行这个脚本。
SELECT
'DROP'
,object_type
,object_name
,CASE(object_type)
WHEN 'TABLE' THEN 'CASCADE CONSTRAINTS;'
ELSE ';'
END
FROM user_objects
WHERE
object_type IN ('TABLE','VIEW','PACKAGE','PROCEDURE','FUNCTION','SEQUENCE')
DECLARE
CURSOR IX IS
SELECT * FROM ALL_OBJECTS WHERE OBJECT_TYPE ='TABLE'
AND OWNER='SCHEMA_NAME';
CURSOR IY IS
SELECT * FROM ALL_OBJECTS WHERE OBJECT_TYPE
IN ('SEQUENCE',
'PROCEDURE',
'PACKAGE',
'FUNCTION',
'VIEW') AND OWNER='SCHEMA_NAME';
CURSOR IZ IS
SELECT * FROM ALL_OBJECTS WHERE OBJECT_TYPE IN ('TYPE') AND OWNER='SCHEMA_NAME';
BEGIN
FOR X IN IX LOOP
EXECUTE IMMEDIATE('DROP '||X.OBJECT_TYPE||' SCHEMA_NAME.'||X.OBJECT_NAME|| ' CASCADE CONSTRAINT');
END LOOP;
FOR Y IN IY LOOP
EXECUTE IMMEDIATE('DROP '||Y.OBJECT_TYPE||' SCHEMA_NAME.'||Y.OBJECT_NAME);
END LOOP;
FOR Z IN IZ LOOP
EXECUTE IMMEDIATE('DROP '||Z.OBJECT_TYPE||' SCHEMA_NAME.'||Z.OBJECT_NAME||' FORCE ');
END LOOP;
END;
/
2) 静态
SELECT 'DROP TABLE "' || TABLE_NAME || '" CASCADE CONSTRAINTS;' FROM user_tables
union ALL
select 'drop '||object_type||' '|| object_name || ';' from user_objects
where object_type in ('VIEW','PACKAGE','SEQUENCE', 'PROCEDURE', 'FUNCTION')
union ALL
SELECT 'drop '
||object_type
||' '
|| object_name
|| ' force;'
FROM user_objects
WHERE object_type IN ('TYPE');
begin
for i in (select 'drop table '||table_name||' cascade constraints' tb from user_tables)
loop
execute immediate i.tb;
end loop;
commit;
end;
purge RECYCLEBIN;