## How do you multiply matrices in T-SQL?

## Why do we use SQL for matrix multiplication?

**Matrix multiplication**using**SQL**is particularly useful for sparse matrices (where many of the values are zero) as you only need to store the non-zero valued entries in the tables. One application for sparse**matrix multiplication**is to determine similarity patterns, e.g.

## What is the proper way to represent a matrix in SQL?

- Astute
**SQL**Server users will immediately point out that this data is not in 3 rd normal form and that the proper way to represent a**matrix**on the data base is to have a table where row and column co-ordinates are columns in the table with yet another column holding the value. Something that might look like this:

## What are the matrix inverse functions in SQL Server?

**SQL**Server**Matrix**Functions. The**matrix**inverse functions take a single**matrix**, 'A', as input and return a**matrix**, 'B', such that the**matrix**product, 'AB', is equal to the identity**matrix**, 'I'. The 'A'**matrix**must be a square**matrix**, meaning that the number of rows is equal to the number of columns.

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