Should an index be created for a table that undergoes regular updates?

Creating an index for a table that is frequently updated requires a balanced approach.

Advantages of indexes:

• They speed up read operations (SELECT), especially when searching by indexed fields.

Disadvantages of indexes with frequent updates:

• Each update (INSERT, UPDATE, DELETE) requires additional work to keep the index up to date, which slows down these operations.
• Indexes occupy additional space on disk.

Recommendations:

• If the table is frequently updated but high read speed on certain fields is important, it is worth creating an index.
• If updates are critical in speed and reading by indexed fields is rare, it is better to avoid indexes or minimize their number.
• Partial or composite indexes can be used to optimize the balance.

In conclusion: creating an index for a table with regular updates is possible, but it is necessary to assess the load and performance requirements. Sometimes it is better to optimize queries or architecture than to create many indexes.