It is very practical to use SQL to query consecutive code segments. (This is often used by the billing system or sp)
How to use SQL to query consecutive code segments in a databaseThere is a clever SQL technique on [database]. Learn it and record it here.
The initial problem was as follows:
I have a table structure,Fphm, kshmInt32 00000001Int32 00000002Int32 00000003Int32 00000004Int32 00000005Int32 0
Px, dp, sp, and androidpxdpsp used in android DevelopmentFirst, we will introduce these units:
Px: pixels (pixels), which corresponds to the actual pixels on the screen.
Dip: device independent pixels, which is a density-independent pixel. It is an abstract unit based on screen density. On a display at 160 o'clock per inch,
1dp = 1px, that is, the 1: 1 relationship. (Dp is dip)
first introduce these units:px : pixels (pixels), the actual pixel point on the corresponding screen.Dip :d evice independent pixels, density independent pixels, based on the abstract unit of screen density.On a monitor that is 160 dots per inch.1DP = 1px, which is 1:1 relationship. (DP is DIP) sp : scaled pixels (enlarge pixels). Pixels independent of density and font scaling. Mainly used for font display
Px, dp, and sp used in android DevelopmentFirst, we will introduce these units:
Px: pixels (pixels), which corresponds to the actual pixels on the screen.
Dip: device independent pixels, which is a density-independent pixel. It is an abstract unit based on screen density. On a display at 160 o'clock per inch,
1dp = 1px, that is, the 1: 1 relationship. (Dp is dip)Sp
first introduce these units:px : pixels (pixels), corresponding to the actual pixel point on the screen.Dip :d evice independent pixels, density independent pixels, based on the abstract unit of screen density. On a 160-point-per-inch display,1DP = 1px, which is 1:1 relationship. (DP is DIP)sp : scaled pixels (enlarge pixels). Pixels independent of density and font scaling. Mainly used for font display of b
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