John Davidson

Message:

In my project I am using DataTables plugin to display data in table from database.

Every column has filter so user can filter data based on input on each column.

I am confused how to setup indexes, do ever column need index?

Is it good practice to index every column in table?

My table have 6 columns.

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My Answer:
In general, it is not necessary to index every column in a table. Indexes should be used strategically to improve the performance of queries that are frequently used in your application.

When using multiple columns in a query, you can create composite indexes that cover the columns used in the query. This can improve the performance of queries that filter or sort data based on multiple columns.

For example, if you frequently query data based on columns A, B, and C, you can create a composite index on (A, B, C) to improve the performance of these queries.

It is also important to consider the cardinality of the columns when deciding which columns to index. Columns with high cardinality (i.e. columns with a large number of distinct values) are good candidates for indexing, as they can help narrow down the search results quickly.

In conclusion, it is not necessary to index every column in a table, but you should strategically index columns that are frequently used in queries and consider creating composite indexes for queries that involve multiple columns.