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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                MySQL 從5.0.1版本開始提供視圖功能。視圖是一種虛擬存在的表,它使用已經存在的表動態生成它的行和列,而且<mark>只保存sql邏輯,并不保存查詢結果(不保存數據)</mark>。
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