Oracle
1Z0-883 · Question #43
Your developers have created table to store some of their program's data. After examining the slow Query Log, you see that they are using the LIKE operator and SUBSTER () functions against a VARCHAR…
The correct answer is D. Redesign the table so that the most commonly searched for string patterns are in their own columns. See the full explanation below for the reasoning.
Question
Your developers have created table to store some of their program's data. After examining the slow Query Log, you see that they are using the LIKE operator and SUBSTER () functions against a VARCHAR (10000) column quite often. An example of the start of one row of data:
`GREEN01020495888331993-12-10/2...' What should you do to improve the overall performance?
Options
- AConvert the column to TEXT and add a fulltext index to the table.
- BCreate multiple prefix indexes of differing lengths.
- CConvert their column to BINARY.
- DRedesign the table so that the most commonly searched for string patterns are in their own columns.
How the community answered
(35 responses)- A14% (5)
- B3% (1)
- C6% (2)
- D77% (27)
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