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Editorial Team
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Asked: 2026-05-31T06:51:17+00:00

Im trying to copy contents from one table to another, both having identical table

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Im trying to copy contents from one table to another, both having identical table structure.

INSERT INTO master SELECT * FROM slave
  ON DUPLICATE KEY UPDATE id=id+1

This gives the error:
#1052 - Column 'id' in field list is ambiguous

Seems like a simple problem but I can’t resolve it. Does anyone know hot to fix this?

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1 Answer

  1. Editorial Team

    What it says is the exact problem: Column 'id' in field list is ambiguous. You have to specify which id column you mean — the master‘s or the slave‘s. You specify the master‘s id column by putting a dot between the table name and field name, master.id:

    INSERT INTO master SELECT * FROM slave
  ON DUPLICATE KEY UPDATE master.id = master.id + 1
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