PostgreSQL MCQ Quiz (Multiple Choice Questions And Answers)
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- be an admin
- have a script do it.
- be a superuser.
- the special CREATETBL privilege
CREATE INDEX lower_title_idx ON books ((lower(title)));- Modifies an index in place to be lowercase
- Creates a new index with a special operator class ‘lower’ for case insensitive comparisons.
- Creates an index for efficient case-insensitive searches on the titles column within the books table
- Nothing, it’s invalid SQL
- Creates a non-write-locking index
- \ed
- edit sql #go
- \e
- \edit
- Index filling up with keys.
- No-longer-needed keys in an index aren’t reclaimed, therefore increasing space required to store an index, as well as time it takes to scan.
- Indexing inefficiently, like choosing to index timestamps in a table.
- Indexing too many tables, resulting in inefficient database performance.
