I'm having a table of users positions, like position 1,2,3,4,5
. Now when any user leaves, I will delete that row and I need to update other users position with -1
.
eg:
If position 2 user leaves, I need to change positions like 3 to 2
, 4 to 3
, 5 to 4
, etc.
Is there any function in mysql that i can use for this type of update?
这样的事情可能会起作用...
update users set position = position-1 where position > 2
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