在MSSQLServer中，此查询正常运行:SELECTcolumn1,(SELECTRelatedColumn1FROMtbl_relatedWHERErecord_id=a1.record_id)ASpseudocolumn1,(SELECTRelatedColumn2FROMtbl_relatedWHERErecord_id=a1.record_id)ASpseudocolumn2,(SELECTRelatedColumn3FROMtbl_relatedWHERErecord_id=a1.record_id)ASpseudocolumn3,(SELECTRelatedColumn