你能帮助我吗?
BEGIN
set @currentdate=now();
set @formateddate=convert(date_format(@currentdate,'%Y%m%d'),char);
select @t;
drop table if exists CONCAT('account_class_',@formateddate)
,CONCAT('class_courses_',@formateddate),CONCAT('student_',@formateddate),CONCAT(
'messages_',@formateddate),CONCAT('announcement_',@formateddate),CONCAT('student
_activity_',@formateddate),CONCAT('activity_',@formateddate),CONCAT('account_cla
ss_students_',@formateddate);
create table CONCAT('account_class_',@formateddate) select * from account_class;
create table CONCAT('class_courses_',@formateddate) select * from class_courses;
create table CONCAT('student_',@formateddate) select * from student;
create table CONCAT('messages_',@formateddate) select * from messages;
create table CONCAT('announcement_',@formateddate) select * from announcement;
create table CONCAT('student_activity_',@formateddate) select * from
student_activity;
create table CONCAT('activity_',@formateddate) select * from activity;
create table CONCAT('account_class_students_',@formateddate) select * from
account_class_students;
END
有什么问题?
答案 0 :(得分:1)
您正在尝试构建表名。这是不允许的。理论上,您可以使用动态SQL:
declare @sql;
set @sql = replace('create table [table] select * from account_class',
[table], 'CONCAT('account_class_', @formateddate));
prepare x from @sql;
execute x;
但是,当简单的视图可以做你想要的(或只是where
子句)时,我会阻止创建这样的表扩散。