by Markus Winand.

Searching for Ranges

Inequality operators such as <, > and between can use indexes just like the equals operator explained above. Even a LIKE filter can—under certain circumstances—use an index just like range conditions do.

Using these operations limits the choice of the column order in multi-column indexes. This limitation can even rule out all optimal indexing options—there are queries where you simply cannot define a “correct” column order at all.


  1. Greater, Less and BETWEEN — The column order revisited

  2. Indexing SQL LIKE FiltersLIKE is not for full-text search

  3. Index Combine — Why not using one index for every column?

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Markus Winand teaches efficient SQL—inhouse and online. He minimizes the development time using modern SQL and optimizes the runtime with smart indexing. His book entitled SQL Performance Explained has become standard reading.

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