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使用定点寄存器的定点指令和其他指令。
Fixed-point instructions and other instructions that use the fixed-point registers.
如果需要表示定点数(譬如,几美元和几美分),则使用BigDecimal。
If you need to represent fixed point Numbers, such as dollars and cents, use BigDecimal instead.
他们使用一种CASE WHEN…THEN ELSE END结构来检测给定点是否是表中的第一个点。
They used a CASE WHEN... THEN ELSE END structure to detect whether a given point was actually the first point in the table.
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