SQL查詢在日期之後返回數據。日期設置爲varcher

Question

嘗試運行一個查詢，該查詢將在某個日期之後返回所有數據。日期設置爲varchar而不是日期。

我：

SELECT employee_id, emp_firstname, emp_lastname, custom79 AS 'First Pay Date', custom6 AS 'Agency', custom56 AS 'Country of Homebase' 
FROM `hs_hr_employee` 
WHERE custom6 LIKE 'Brookfield' 
AND custom61 LIKE 'active-oam' 
AND custom79 > '13-07-2012' 

幫助將是偉大的，因爲我不知道如何轉換爲日期查詢

使用UNIX，phpMyAdmin的，SQL

Answer 1

嘗試這樣的：

SELECT employee_id, emp_firstname, emp_lastname, custom79 AS 'First Pay Date', custom6 AS 'Agency', custom56 AS 'Country of Homebase' 
FROM `hs_hr_employee` 
WHERE custom6 LIKE 'Brookfield' 
AND custom61 LIKE 'active-oam' 
AND STR_TO_DATE(custom79, '%d-%m-%Y') > '2012-07-13'