顺序数据生成
Sequential Data Generation
我想创建 5 个字符串顺序数据,例如
aaaaa
aaaab
aaaac
..最多
zzzzx
zzzzy
zzzzz
sql 是否有任何功能可以帮助我生成顺序数据?
目前我有四位数的时序数据,如何生成五位数的时序数据?
我有什么
aaaa
aaab
aaac
..最多
zzzx
zzzy
zzzz
我编写了以下程序,但它需要很长时间才能完成..任何人都可以帮助我重写程序或建议不同的方法。
CREATE DEFINER=`root`@`localhost` PROCEDURE `new_procedure`()
BEGIN
DECLARE a INT Default 1 ;
DECLARE tran varchar(255) Default 'aaaa';
simple_loop: LOOP
SET a=a+1;
SET tran = (select fourth from m where idm=a);
Insert into test.qwe(zxc) values (CONCAT(tran,'a'));
Insert into test.qwe(zxc) values (CONCAT(tran,'b'));
Insert into test.qwe(zxc) values (CONCAT(tran,'c'));
Insert into test.qwe(zxc) values (CONCAT(tran,'d'));
Insert into test.qwe(zxc) values (CONCAT(tran,'e'));
Insert into test.qwe(zxc) values (CONCAT(tran,'f'));
Insert into test.qwe(zxc) values (CONCAT(tran,'g'));
Insert into test.qwe(zxc) values (CONCAT(tran,'h'));
Insert into test.qwe(zxc) values (CONCAT(tran,'i'));
Insert into test.qwe(zxc) values (CONCAT(tran,'j'));
Insert into test.qwe(zxc) values (CONCAT(tran,'k'));
Insert into test.qwe(zxc) values (CONCAT(tran,'l'));
Insert into test.qwe(zxc) values (CONCAT(tran,'m'));
Insert into test.qwe(zxc) values (CONCAT(tran,'n'));
Insert into test.qwe(zxc) values (CONCAT(tran,'o'));
Insert into test.qwe(zxc) values (CONCAT(tran,'p'));
Insert into test.qwe(zxc) values (CONCAT(tran,'q'));
Insert into test.qwe(zxc) values (CONCAT(tran,'r'));
Insert into test.qwe(zxc) values (CONCAT(tran,'s'));
Insert into test.qwe(zxc) values (CONCAT(tran,'t'));
Insert into test.qwe(zxc) values (CONCAT(tran,'u'));
Insert into test.qwe(zxc) values (CONCAT(tran,'v'));
Insert into test.qwe(zxc) values (CONCAT(tran,'w'));
Insert into test.qwe(zxc) values (CONCAT(tran,'x'));
Insert into test.qwe(zxc) values (CONCAT(tran,'y'));
Insert into test.qwe(zxc) values (CONCAT(tran,'z'));
IF a=1 THEN
LEAVE simple_loop;
END IF;
END LOOP simple_loop;
END
从零开始:
CREATE TABLE alpha (a CHAR(1) NOT NULL);
INSERT INTO alpha (a) VALUES
('a'), ('b'), ('c'), ('d'), ('e'), ('f'),
('g'), ('h'), ('i'), ('j'), ('k'), ('l'),
('m'), ('n'), ('o'), ('p'), ('q'), ('r'),
('s'), ('t'), ('u'), ('v'), ('w'), ('x'),
('y'), ('z');
CREATE TABLE qwe (zxc CHAR(5) NOT NULL);
INSERT INTO qwe (zxc)
SELECT CONCAT(a1.a, a2.a, a3.a, a4.a, a5.a)
FROM alpha a1, alpha a2, alpha a3, alpha a4, alpha a5;
如果您已经在table中拥有所有长度为4的字符串,您只需连接一次alpha并连接值以生成所有长度为5的字符串。这仍然需要一些时间, 没办法。
我写的 sql 程序成功了。popoulta 6 个字符串单词的 26x26x26x26 组合花了大约 4-5 个小时。
感谢所有建议!
我想创建 5 个字符串顺序数据,例如
aaaaa
aaaab
aaaac
..最多
zzzzx
zzzzy
zzzzz
sql 是否有任何功能可以帮助我生成顺序数据?
目前我有四位数的时序数据,如何生成五位数的时序数据?
我有什么
aaaa
aaab
aaac
..最多
zzzx
zzzy
zzzz
我编写了以下程序,但它需要很长时间才能完成..任何人都可以帮助我重写程序或建议不同的方法。
CREATE DEFINER=`root`@`localhost` PROCEDURE `new_procedure`()
BEGIN
DECLARE a INT Default 1 ;
DECLARE tran varchar(255) Default 'aaaa';
simple_loop: LOOP
SET a=a+1;
SET tran = (select fourth from m where idm=a);
Insert into test.qwe(zxc) values (CONCAT(tran,'a'));
Insert into test.qwe(zxc) values (CONCAT(tran,'b'));
Insert into test.qwe(zxc) values (CONCAT(tran,'c'));
Insert into test.qwe(zxc) values (CONCAT(tran,'d'));
Insert into test.qwe(zxc) values (CONCAT(tran,'e'));
Insert into test.qwe(zxc) values (CONCAT(tran,'f'));
Insert into test.qwe(zxc) values (CONCAT(tran,'g'));
Insert into test.qwe(zxc) values (CONCAT(tran,'h'));
Insert into test.qwe(zxc) values (CONCAT(tran,'i'));
Insert into test.qwe(zxc) values (CONCAT(tran,'j'));
Insert into test.qwe(zxc) values (CONCAT(tran,'k'));
Insert into test.qwe(zxc) values (CONCAT(tran,'l'));
Insert into test.qwe(zxc) values (CONCAT(tran,'m'));
Insert into test.qwe(zxc) values (CONCAT(tran,'n'));
Insert into test.qwe(zxc) values (CONCAT(tran,'o'));
Insert into test.qwe(zxc) values (CONCAT(tran,'p'));
Insert into test.qwe(zxc) values (CONCAT(tran,'q'));
Insert into test.qwe(zxc) values (CONCAT(tran,'r'));
Insert into test.qwe(zxc) values (CONCAT(tran,'s'));
Insert into test.qwe(zxc) values (CONCAT(tran,'t'));
Insert into test.qwe(zxc) values (CONCAT(tran,'u'));
Insert into test.qwe(zxc) values (CONCAT(tran,'v'));
Insert into test.qwe(zxc) values (CONCAT(tran,'w'));
Insert into test.qwe(zxc) values (CONCAT(tran,'x'));
Insert into test.qwe(zxc) values (CONCAT(tran,'y'));
Insert into test.qwe(zxc) values (CONCAT(tran,'z'));
IF a=1 THEN
LEAVE simple_loop;
END IF;
END LOOP simple_loop;
END
从零开始:
CREATE TABLE alpha (a CHAR(1) NOT NULL);
INSERT INTO alpha (a) VALUES
('a'), ('b'), ('c'), ('d'), ('e'), ('f'),
('g'), ('h'), ('i'), ('j'), ('k'), ('l'),
('m'), ('n'), ('o'), ('p'), ('q'), ('r'),
('s'), ('t'), ('u'), ('v'), ('w'), ('x'),
('y'), ('z');
CREATE TABLE qwe (zxc CHAR(5) NOT NULL);
INSERT INTO qwe (zxc)
SELECT CONCAT(a1.a, a2.a, a3.a, a4.a, a5.a)
FROM alpha a1, alpha a2, alpha a3, alpha a4, alpha a5;
如果您已经在table中拥有所有长度为4的字符串,您只需连接一次alpha并连接值以生成所有长度为5的字符串。这仍然需要一些时间, 没办法。
我写的 sql 程序成功了。popoulta 6 个字符串单词的 26x26x26x26 组合花了大约 4-5 个小时。
感谢所有建议!