[英]Calculate column date value from variable and other column date offset
I have a project management table with 1000 tasks/records, each with a dynamic starting_date
and ending_date
column.我有一个包含 1000 个任务/记录的项目管理表,每个任务/记录都有一个动态的
starting_date
和ending_date
列。 The values of those dates are calculated by taking a static project "going-live" date (eg 2022-10-01
) and then deducting the task_offset_days
value of each record (eg -211), resulting in the starting_date
value.这些日期的值是通过采用 static 项目“上线”日期(例如
2022-10-01
)然后减去每条记录的task_offset_days
值(例如 -211),得到starting_date
值来计算的。 The end date is calculated via a days_to_complete
column with eg 60
days value, which if added to the starting_date
gives me the final ending_date
.结束日期是通过
days_to_complete
列计算的,例如60
天的值,如果将其添加到starting_date
就会得到最终的ending_date
。
Example: Live date = 2022-10-01
, offset by -211
days results in starting_date = '2022-03-04'
, which plus days_offset
of 60
results in ending_date = 2022-05-03
.示例:Live date =
2022-10-01
,偏移-211
天导致starting_date = '2022-03-04'
,加上days_offset
60
导致ending_date = 2022-05-03
。
Here the issue:这里的问题:
I want to copy the 1000 records to another table and during the process want to update the starting_date
, ending_date
value based on another going-live date.我想将 1000 条记录复制到另一个表,并在此过程中想根据另一个上线日期更新
starting_date
和ending_date
值。 How can I do this in the most efficient way considering I am copying and editing 1000 records?考虑到我正在复制和编辑 1000 条记录,我怎样才能以最有效的方式做到这一点?
Current copy query:当前副本查询:
@live_date = '2022-10-01'; // going-live date
INSERT INTO `new_task_table` (
`property_id`, // unique identifier, not present in original table
`status`,
`task_desc`,
`phase`,
`workstream`,
`task_level`,
`task_owner_group`,
`start_date`, // = live date - offset
`end_date`, // = start date + days to complete
`offset_days`, // eg. -211 (note: can be below / above zero: -211 or 120)
`days_to_complete`, // eg. 60
`created_at`
)
SELECT
'31',
`status`,
`task_desc`,
`phase`,
`workstream`,
`task_level`,
`task_owner_group`,
`start_date`,
`end_date`,
`offset_days`,
`days_to_complete`,
'2022-01-01 00:00:00' // date of query execution
FROM `old_task_table`;
It's probably simpler than you think.它可能比你想象的要简单。 You just pass the values into the
SELECT
您只需将值传递到
SELECT
@live_date = '2022-10-01'; // going-live date
INSERT INTO `new_task_table` (
`property_id`, // unique identifier, not present in original table
`status`,
`task_desc`,
`phase`,
`workstream`,
`task_level`,
`task_owner_group`,
`start_date`, // = live date - offset
`end_date`, // = start date + days to complete
`offset_days`, // eg. -211 (note: can be below / above zero: -211 or 120)
`days_to_complete`, // eg. 60
`created_at`
)
SELECT
'31',
`status`,
`task_desc`,
`phase`,
`workstream`,
`task_level`,
`task_owner_group`,
DATE_ADD(@live_date, INTERVAL offset_days DAY) AS start_date,
DATE_ADD(@live_date,INTERVAL offset_days + days_to_complete DAY) AS end_date,
`offset_days`,
`days_to_complete`,
'2022-01-01 00:00:00' // date of query execution
FROM `old_task_table`;
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