According to the scope of the data to sub-database and sub-table, this program is the simplest one, and it can also be used in flexibly combined with other sub-database and sub-table programs. Nowadays, a very popular distributed database: TiDB database. Aiming at the fragmentation of d...
What do you need to think about and do in order to use sampling properly? Roll a fair die, and take the square of the number you get. What is the expected value of that number? (Hint: the values are 1, 4, 9, with probability 1/6, 1/6, 1/6, ) (Do not ...