INSERT INTO "表格1" ("栏位1", "栏位2", ...) SELECT "栏位3", "栏位4", ... FROM "表格2"
inset into t_split_aa(batchId,contractId,clientId,type,year,month,date,amount,totalPrice,totalHours,unitPrice,note,days,signDate,cancelDate,firstDate,legalId,freezenDays) select batchId,contractId,clientId,type,year,month,date,amount,totalPrice,totalHours,unitPrice,note,days,signDate,cancelDate,firstDate,legalId,freezenDays from t_split_a order by id