Delete a duplicated line in the example in explain-indexes.md (pingca…

…p#7052) (pingcap#7065)
ti-chi-bot · Nov 30, 2021 · 266257b · 266257b
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commit 266257b
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diff --git a/explain-indexes.md b/explain-indexes.md
@@ -40,7 +40,6 @@ TiDB uses the `IndexLookup` operator when retrieving data from a secondary index
 EXPLAIN SELECT * FROM t1 WHERE intkey = 123;
 EXPLAIN SELECT * FROM t1 WHERE intkey < 10;
 EXPLAIN SELECT * FROM t1 WHERE intkey BETWEEN 300 AND 310;
-EXPLAIN SELECT * FROM t1 WHERE intkey BETWEEN 300 AND 310;
 EXPLAIN SELECT * FROM t1 WHERE intkey IN (123,29,98);
 EXPLAIN SELECT * FROM t1 WHERE intkey >= 99 AND intkey <= 103;
 ```