MySQL errorno 121

by

Check that all your constraints are really spelled out correctly, also check that there’s not any other tables that uses the constraint names FK_userId or FK_blogId

Related Contents:

  1. Error Code: 1005. Can’t create table ‘…’ (errno: 150)
  2. MySQL “ERROR 1005 (HY000): Can’t create table ‘foo.#sql-12c_4’ (errno: 150)”
  3. How to truncate a foreign key constrained table?
  4. How do I see all foreign keys to a table or column?
  5. MySQL DROP all tables, ignoring foreign keys
  6. Add Foreign Key to existing table
  7. MySQL Error 1215: Cannot add foreign key constraint
  8. MySQL Cannot Add Foreign Key Constraint
  9. How to find all tables that have foreign keys that reference particular table.column and have values for those foreign keys?
  10. How to remove constraints from my MySQL table?
  11. Show constraints on tables command
  12. Mysql error 1452 – Cannot add or update a child row: a foreign key constraint fails
  13. Foreign key constraints: When to use ON UPDATE and ON DELETE
  14. MySQL Removing Some Foreign keys
  15. MySQL foreign key constraints, cascade delete
  16. Force drop mysql bypassing foreign key constraint
  17. What is a proper naming convention for MySQL FKs?
  18. How to change the foreign key referential action? (behavior)
  19. How to create relationships in MySQL
  20. MySQL cannot create foreign key constraint
  21. MySQL Creating tables with Foreign Keys giving errno: 150
  22. Basics of Foreign Keys in MySQL?
  23. sql error errno: 121
  24. MySQL InnoDB foreign key between different databases
  25. Force InnoDB to recheck foreign keys on a table/tables?
  26. Meaning of “n:m” and “1:n” in database design
  27. MySQL – Conditional Foreign Key Constraints
  28. Django “Cannot add or update a child row: a foreign key constraint fails”
  29. Exact Meaning of MySQL’s Foreign Key ‘on delete restrict’ Clause
  30. MySQL. Can’t create table errno 150
  31. Disabling foreign key checks on the command line
  32. MySQL: delete a row ignoring foreign key constraint
  33. MySQL RESTRICT and NO ACTION
  34. View all foreign key constraints for entire MySQL database
  35. MySQL foreign key to allow NULL?
  36. MySQL terminology “constraints” vs “foreign keys” difference?
  37. MySQL: How do I find out which tables reference a specific table?
  38. Can a foreign key reference a non-unique index?
  39. Is it possible to reference one column as multiple foreign keys?
  40. MySQL’s INSERT IGNORE INTO & foreign keys
  41. Drop foreign key only if it exists
  42. How do I use on delete cascade in mysql?
  43. Why do I need to use foreign key if I can use WHERE?
  44. How to insert values in table with foreign key using MySQL?
  45. MySQL Foreign Key Error 1005 errno 150 primary key as foreign key
  46. Why can’t a text column have a default value in MySQL?
  47. How to import an excel file in to a MySQL database
  48. mysqldump – Export structure only without autoincrement
  49. Show tables by engine in MySQL
  50. Why is SQLAlchemy count() much slower than the raw query?

Leave a Comment