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Editorial Team
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Asked: 2026-05-16T09:10:46+00:00

Is it possible to retrieve information like: the tables the indexes with the columns

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Is it possible to retrieve information like:

  • the tables
  • the indexes with the columns they index
  • the columns in each table along with their types
  • constraints like unique keys, foreign keys, not null ..

using sql from all (major) RDBMSs?

I know it is possible for oracle and assume it is possible for most others. Are there any important exceptions to this?

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1 Answer

  1. Editorial Team

    For many databases you can make use of the INFORMATION_SCHEMA tables:

    SELECT *
FROM INFORMATION_SCHEMA.Columns

    and similar selects for other info such as indexes and relationships.

    According to this link:

    • Microsoft SQL Server – Supported in Version 7 and up
    • MySQL – Supported in Version 5 and up
    • PostgreSQL – Supported in Version 7.4 and up
    • Oracle – Does not appear to be supported
    • Apache Derby – NOT Supported As of Version 10.3
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