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PostgreSQL tutorial. Error messages help: cause and solution.

  • Column must appear in the GROUP BY clause
  • Column specified more than once
  • Constraint for relation already exists
  • Constraint of relation does not exist
  • Control reaches end of function without return
  • ERROR: cannot begin/end transactions in PL/pgSQL
  • Duplicate key value violates unique constraint
  • Duplicate key value violates NOT NULL unique constraint
  • INSERT has more target columns than expressions
  • Invalid input syntax for type boolean
  • Multiple primary keys for table are not allowed
  • Negative substring length not allowed
  • Null value in column violates not-null constraint
  • PostgreSQL Numeric field overflow
  • Relation does not exist
  • Value too long for type character varying or type numeric

Filed Under: PostgreSQL

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