eggyal

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3 Questions

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6	Must an index cover all selected columns for it to be used for ORDER BY?
5	Walking a BTREE index as far as possible in MySQL
4	What corner cases exist when relying on undocumented behaviour to determine values selected by MySQL for hidden columns in GROUP BY operations?

46 Reputation

+10	How to grant multiple users privileges; MySQL
+25	Walking a BTREE index as far as possible in MySQL
+5	Must an index cover all selected columns for it to be used for ORDER BY?
+5	What corner cases exist when relying on undocumented behaviour to determine values selected by MySQL for hidden columns in GROUP BY operations?

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2 Answers

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1	How to grant multiple users privileges; MySQL
1	MySQL Indexing VarChar

9 Tags

2 mysql × 5	0 optimization
1 varchar	0 btree
1 dns	0 order-by
0 index × 2	0 innodb
0 group-by

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