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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
                有3種:float, double, decimal float(M,D):單精度(精確到小數點后7位), 4個字節儲存數據, M代表總長度,D代表小數位數. 例如:float(6,2)//總長度為6位,小數長度為2位,小數點不算 double(M,D):雙精度(精確到小數點后15位),使用8個字節存儲數據, decimal(M,D):定點小數類型,整數部分最長可以有65位,小數部分最長可以有30位。一般設置格式為:decimal(總位數,小數部分位數) 不設置M,D時,默認(10,0)
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