我有桌子
table1
****************************
id | start_date | end_date
1 30/06/2012 01/01/9999
当我插入新行时
id | start_date | end_date
1 30/06/2012 26/06/2012 <- Now it is the start date of the next row2
2 26/06/2012 01/01/9999
插入行的开始日期将成为前一行的结束日期,依此类推。
$sql = "INSERT INTO
table1(cate_id,task_id,obj,end_date,start_date,line)
SELECT
$cate_id ,
$task_id,
$obj,
'2011-02-28', -> this what I am trying to do
'9999-01-01', -> this what I am trying to do
line1
FROM
line_task
WHERE
line_task_id = (
SELECT
line_task_id
FROM
task
WHERE
task_id = 2
)";
当我尝试这样的事情时:
insert into table1(cate_id,task_id,obj, start_date, end_date,line)
values (4,3,23, (Select max(end_date) from table1),end_date,'value_line');
我收到消息:
Error code 1093, SQL state HY000: You can't specify target table 'table1' for update in FROM clause
Line 1, column 1
0 秒后执行完成,发生 1 个错误
能告诉我如何用mysql做到这一点吗?谢谢