发布于 2016-03-14 11:35:26 | 64 次阅读 | 评论: 0 | 来源: 网友投递
Mysql关系型数据库管理系统
MySQL是一个开放源码的小型关联式数据库管理系统,开发者为瑞典MySQL AB公司。MySQL被广泛地应用在Internet上的中小型网站中。由于其体积小、速度快、总体拥有成本低,尤其是开放源码这一特点,许多中小型网站为了降低网站总体拥有成本而选择了MySQL作为网站数据库。
fetchSeqLoop:Loop
fetch cursor into _seqname, _value;
end Loop;
declare fetchSeqOk boolean; ## define the flag for loop judgement
declare _seqname varchar(50); ## define the varient for store the data
declare _value bigint(20);
declare fetchSeqCursor cursor for select seqname, value from sys_sequence;## define the cursor
declare continue handler for NOT FOUND set fetchSeqOk = true; ## define the continue handler for not
found flag
set fetchSeqOk = false;
open fetchSeqCursor;
fetchSeqLoop:Loop
if fetchSeqOk then
leave fetchSeqLoop;
else
fetch cursor into _seqname, _value;
select _seqname, _value;
end if;
end Loop;
close fetchSeqCursor;
declare fetchSeqOk boolean; ## define the flag for loop judgement
declare _seqname varchar(50); ## define the varient for store the data
declare _value bigint(20);
declare fetchSeqCursor cursor for select seqname, value from sys_sequence;## define the cursor
declare continue handler for NOT FOUND set fetchSeqOk = true; ## define the continue handler for not
found flag
set fetchSeqOk = false;
open fetchSeqCursor;
fetchSeqLoop:Loop
if fetchSeqOk then
leave fetchSeqLoop;
else
fetch cursor into _seqname, _value;
begin
declare fetchSeqOk boolean default 'inner';
declare cursor2 cursor for select .... from ...;## define the cursor
declare continue handler for NOT FOUND set fetchSeqOk = true; ## define the continue handler for n
ot
set fetchSeqOk = false;
open cursor2;
fetchloop2 loop
if fetchSeqOk then
else
end if;
end loop;
close cursor2;
end;
end if;
end Loop;
close fetchSeqCursor;