how to concatenate SQL statements to return data of type float when querying?
how to concatenate SQL statements to return data of type float when querying?
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how to realize the if judgment of mysql. There is now a table with two key fields SELECT * FROM house WHERE price= 8500 OR shoufu= 30 I think, when the $price passed in by php is empty, the sql search statement is SELECT * FROM house WHERE s...
linux server, a master server, the speed of using tp5 to connect to the website opened by mysql, is too slow, how to solve it? skip_name_resolve this part of the code has been added ...
recently, I have been looking at other people s projects and found that some projects separate the user table from the user balance table to create . user-> user Table user balance-> user_balance Table (which contains the user id and the number of us...
$cardNoBegin = 1; $cardNoEnd = 10000; $where[ number ] = array( between , [$cardNoBegin , $cardNoEnd]); $list = VipCardModel::where($where)->field( id,number,issue_uid,rank )->select(); foreach($list as &$value){ foreach $value...