A method for operating a memory is provided. The memory has an array of memory cells arranged in a plurality of rows and columns. Each row includes a label storage unit. The method includes receiving a first to-be-programmed data set to be stored into a target row and determining whether a condition is satisfied. When the condition is satisfied, performing a first operation on the first to-be-programmed data set to obtain a second to-be-programmed data set, programming the second to-be-programmed data set into the target row of memory cells, and setting the value of the label storage, unit to be a first labeling value. When the condition is not satisfied, performing a second operation on the first to-be-programmed data set to program the first to-be-programmed data set into the target row of memory cells, and setting the value of the label storage unit to be a second labeling value.