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+ sql := "UPDATE `OilCatalog` a,( SELECT b.`LegalPerson`, b.`Address`, b.`CommercialNo`, b.`RegCapital`, a.`CompanyName` FROM OilCatalog a LEFT JOIN `OilSupplier` b ON b.`SupplierName` = a.`CompanyName` ) c SET a.`LegalPerson` = c.`LegalPerson`, a.`Address` = c.`Address`, a.`USCCode` = c.`CommercialNo`, a.`RegCapital` = c.`RegCapital` where c.CompanyName=a.CompanyName"
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