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Co-authored-by: Daniël van Eeden <[email protected]>

statistics.md

@@ -93,7 +93,7 @@ For details about the parameter that determines the upper limit to the number of
 
 Count-Min Sketch is a hash structure. When an equivalence query contains `a = 1` or `IN` query (for example, `a IN (1, 2, 3)`), TiDB uses this data structure for estimation.
 
-A hash collision might occur since Count-Min Sketch is a hash structure. In the `EXPLAIN` statement, if the estimate of the equivalent query deviates greatly from the actual value, it can be considered that a larger value and a smaller value have been hashed together. In this case, you can take one of the following ways to avoid the hash collision:
+A hash collision might occur since Count-Min Sketch is a hash structure. In the [`EXPLAIN`](/sql-statements/sql-statement-explain.md) statement, if the estimate of the equivalent query deviates greatly from the actual value, it can be considered that a larger value and a smaller value have been hashed together. In this case, you can take one of the following ways to avoid the hash collision:
 
 - Modify the `WITH NUM TOPN` parameter. TiDB stores the high-frequency (top x) data separately, with the other data stored in Count-Min Sketch. Therefore, to prevent a larger value and a smaller value from being hashed together, you can increase the value of `WITH NUM TOPN`. In TiDB, its default value is 20. The maximum value is 1024. For more information about this parameter, see [Manual collection](#manual-collection).
 - Modify two parameters `WITH NUM CMSKETCH DEPTH` and `WITH NUM CMSKETCH WIDTH`. Both affect the number of hash buckets and the collision probability. You can increase the values of the two parameters appropriately according to the actual scenario to reduce the probability of hash collision, but at the cost of higher memory usage of statistics. In TiDB, the default value of `WITH NUM CMSKETCH DEPTH` is 5, and the default value of `WITH NUM CMSKETCH WIDTH` is 2048. For more information about the two parameters, see [Manual collection](#manual-collection).