sql - Swapping MySQL Data between Rows -

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the goal run mysql query swaps around table id's.

the table 

id  tableid     car 1     1        ford mustang 2     1        ford focus 3     1        ford ranger 4     2        toyota 4runner 5     2        toyota celica 6     3        chevy camaro 7     4        cadillac escalade 8     4        cadillac cts 9     6        dodge charger 10    6        dodge ram 11    6        dodge caravan

if run these queries

update table set tableid='2' tableid='1' update table set tableid='1' tableid='2' update table set tableid='5' tableid='6'

so idea i'd swap tableid's 1 , 2. however, happen after first query of tableid 1 merge tableid 2. second query update of tableid 2 (which includes old tableid 1 , tableid 2) tableid 1.

the last query have no issues there no conflict. however, how write query swap 2 tableid's in instance without tables getting messed (joining)?

just in 1 query, using case statement:

update table     set tableid = (case when tableid = '1' '2'                          when tableid = '2' '1'                         when tableid = '5' '6'                    end)     tableid in ('1', '2', '5');

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