Will PHPMYSQL transactions be concurrent? suppose there are tables A and B. The premise of inserting data into Table B is to judge table A first. If Table A is determined in the program first, and then data is inserted, concurrency occurs .. If the transaction is made, insert the data and then judge Table A. If the conditions do not match, roll back... & Nbsp; does this solve the problem? does it seem to be still concurrent ?, Will the select... forupd php mysql transaction be concurrent?
Suppose there are tables A and B.
The premise of inserting data into Table B is to judge table A first.
If Table A is determined in the program first, and then data is inserted, concurrency occurs ..
If the transaction is made, insert the data and then judge Table A. If the conditions do not match, roll back...
Can this solve the problem, as if it would still be concurrent?
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Use select... for update
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Discussion
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