比如:sql中統計登錄失敗超過2次的賬號
SELECT card, COUNT(*) AS count FROM logs
GROUP BY card
HAVING COUNT(*) >= 2;
比如:sql中統計登錄失敗超過2次的賬號
SELECT card, COUNT(*) AS count FROM logs
GROUP BY card
HAVING COUNT(*) >= 2;
五、操縱dataset 在DataSet中DataRow是其所有數據的基本存放位置,它主要是由一個值數組組成,代表DataTable單獨一行。 Da