一列php mysql上的多个选择语句

Question

Hello i am trying to retrieve a list of records from my database and table using two criterias and the data has to be combined as one

the first statement which i have written is

FROM `transactions` WHERE `Start_Date` = '$_POST[start]' AND `Company` = '$_POST[star]' and Status = ''

this statement all the records which has its column as empty,

now i want to also capture together with this data all columns that have status as successful

FROM `transactions` WHERE `Start_Date` = '$_POST[start]' AND `Company` = '$_POST[star]' and Status = 'successful'

please how do i combine this, i initially tried this

FROM transactions WHERE Start_Date = '$_POST[start]' AND Company = '$_POST[star]' and Status = '' and (status = 'successful')

i thought it should work but it dosent seem to work, any help please on the correct way

Answer 1

Each row in your table will be evaluated individually to see if it meets the criteria defined in the WHERE clause. Since you need to check for two possible values in the same column, and one row cannot have two different values for the same column, you'll need to use OR instead of AND .

WHERE
    `Start_Date` = '$_POST[start]'
     AND `Company` = '$_POST[star]'
     AND (`Status` = '' OR `Status` = 'successful')

The effect of this will be like combining your two queries. You'll get all rows that meet the Start_date and Company criteria as well as having either Status = '' or Status = 'successful' .

Answer 2

You can use "IN" operator to achieve this.

FROM 'transactions' WHERE 'Start_Date' = '$_POST[start]' AND 'Company' = '$_POST[star]' AND Status IN ('','successful')