double precision number

基本解释

Gets the value of the column as a double-precision floating point number.
指定的列不包含雙精度浮點數。
Regan speculated that this particular number is troublesome because it is the "largest subnormal double-precision floating-point number."
Regan 推測這個特殊數字的麻煩之処在於它是“最大的次法線雙精度浮點數”。
The DOUBLE type can also be referred to as DOUBLE PRECISION, although it isn't clear why you would want to type the extra word every time you need a double-precision number.
DOUBLE 類型也可以表示爲 DOUBLE PRECISION，雖然爲什麽在需要雙精度數字時要輸入額外的單詞，原因不明。