mysql不會插入5至10個用戶同時提交的相同php格式的所有數據

Question

我正在使用php表單提交學費。如果單用戶提交該表單，一切正常，並且數據保存在MySQL數據庫中。但是如果我使用同一時間從5-10個不同系統提交該表單，則MySQL會插入兩個或僅三個用戶的數據。 我正在為invoice_id使用觸發器：

CREATE TRIGGER `test_trig` BEFORE INSERT ON `student_fee_transaction_details`
 FOR EACH ROW BEGIN
    SET NEW.inv_no=(SELECT CONCAT(NEW.school_id,'-', SUBSTRING_INDEX( inv_no,  '-', -1 ) +1 ) AS inv_number_new
FROM student_fee_transaction_details
WHERE id IN (SELECT MAX( id ) FROM student_fee_transaction_details WHERE school_id = NEW.school_id
));
END

這是我要插入的PHP代碼

insert into student_fee_transaction_details (id,fine_amount,interest_amount,handling_charges,
institute_id,school_id,student_id,class_id,section_id,admission_no,fees_amount,payment_date,
payment_mode,paid_amount,inv_date,inv_ref_no,inv_no,inv_status,session,payment_bank,payment_type,
cheque_dd_no,payment_chanel,fee_due_date,cheque_dd_date,remarks,deposit_bank_id)
values('','$fine_amt','$interest_amt','$hand_charge','$ins_id','$sch_id','$stu_id','$cls_id',
'$sec_id','$adm_no','$total_fee_paid_amt','$pay_dt','Manual','$total_paid_amt','$inv_dt',
'$ref_no','1898776','Invoiced','$session','$bank_nm','$pay_type','$dd_chq_no','web',
'$fee_due_date','$dd_cheq_dt','$swipe_remarks','$deposit_bank')";
 $result_inv_master = $con->query($qry_inv_master); 

Answer 1

只需將您的id列設置為“ 自動遞增” ，就不要在查詢中將id值傳遞為'' 。 像這樣

insert into student_fee_transaction_details (fine_amount,interest_amount,handling_charges,
institute_id,school_id,student_id,class_id,section_id,admission_no,fees_amount,payment_date,
payment_mode,paid_amount,inv_date,inv_ref_no,inv_no,inv_status,session,payment_bank,payment_type,
cheque_dd_no,payment_chanel,fee_due_date,cheque_dd_date,remarks,deposit_bank_id)
values('$fine_amt','$interest_amt','$hand_charge','$ins_id','$sch_id','$stu_id','$cls_id',
'$sec_id','$adm_no','$total_fee_paid_amt','$pay_dt','Manual','$total_paid_amt','$inv_dt',
'$ref_no','1898776','Invoiced','$session','$bank_nm','$pay_type','$dd_chq_no','web',
'$fee_due_date','$dd_cheq_dt','$swipe_remarks','$deposit_bank')";
 $result_inv_master = $con->query($qry_inv_master); 

進行更改，然后不會再出現此問題。