Create example-sql-statements-that-generate-error-message.sql

Author: Deepak-Vohra

sql-queries-11/fix-error-1064-when-using-ALTER-TABLE-ADD CONSTRAINT-in-MySQL/example-sql-statements-that-generate-error-message.sql

@@ -0,0 +1,54 @@
+//Correct syntax
+ALTER TABLE specification
+ADD CONSTRAINT specification_program_id_fkey 
+FOREIGN KEY (program_id)
+REFERENCES program (id);
+
+//Incorrect syntax; jumbled syntax
+ALTER TABLE specification
+ADD FOREIGN KEY specification_program_id_fkey 
+CONSTRAINT(program_id)
+REFERENCES program(id);
+
+//Incorrect syntax; wrong punctuation
+ALTER TABLE specification (
+ADD CONSTRAINT
+  specification_program_id_fkey 
+  FOREIGN KEY(program_id)
+  REFERENCES program (id)
+);
+
+//Incorrect syntax; a reserved word
+ALTER TABLE specification
+ADD CONSTRAINT foreign 
+FOREIGN KEY (program_id)
+REFERENCES program (id);
+
+//Incorrect syntax, misspelled keyword REFERENCES
+ALTER TABLE specification
+ADD CONSTRAINT specification_program_id_fkey 
+FOREIGN KEY(program_id)
+REFERENCE program (id);
+
+//Incorrect syntax, missing closing parenthesis
+ALTER TABLE specification
+ADD CONSTRAINT specification_program_id_fkey 
+FOREIGN KEY(program_id
+REFERENCES program (id);
+
+//Incorrect syntax; quotes
+ALTER TABLE 'specification'
+ADD CONSTRAINT specification_program_id_fkey 
+FOREIGN KEY('program_id')
+REFERENCES program ('id');
+
+//Correct syntax; backticks
+ALTER TABLE `specification`
+ADD CONSTRAINT specification_program_id_fkey 
+FOREIGN KEY(`program_id`)
+REFERENCES program (`id`);
+
+//Incorrect syntax, missing required elements
+ALTER TABLE specification
+ADD CONSTRAINT specification_program_id_fkey
+FOREIGN KEY(program_id);