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Recent questions tagged primary-key

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1 answer 14 views
Problem: Any solution to this issue > A foreign key cannot refer to a primary key in the same table. true or false?
asked Apr 30 ummeshani 10.8k points
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1 answer 9 views
Problem: I have been trying to fix this issue but I couldn't find the solution > The columns in table *** do not match an existing primary key or UNIQUE constraint
asked Apr 26 munim01 21k points
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1 answer 2 views
Problem: ''' CREATE TABLE Employee ( employeeID INT (10) PRIMARY KEY, Name CHAR (20) ); ''' ''' CREATE TABLE SALARY ( employeeID INT (10) PRIMARY KEY, Salary INT (10) ); ''' Is it possible to use the same primary key in both tables?
asked Apr 26 sumaiya simi 43.9k points
1 vote
1 answer 6 views
Problem : Interested to know > How can I define a composite primary key in SQL?
asked Apr 25 Abik Dey 4k points
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1 answer 7 views
Problem: MySQL 1062 - Duplicate entry '0' for key 'PRIMARY'. Is there any way to assign rowid to a new Primary Key?
asked Apr 17 sumaiya simi 43.9k points
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1 answer 45 views
Problem: I have a problem on this error message, when i try this: INSERT INTO `PROGETTO`.`UFFICIO-INFORMAZIONI` (`ID`, `viale`, `num_civico`, `data_apertura`, `data_chiusura`, `orario_apertura`, `orario_chiusura`, `telefono`, `mail`, `web`, `Nome-paese`, `Comune`) VALUES ( ... ', 'Bolzano', 'BZ') Error Code: 1062. Duplicate entry '1' for key 'PRIMARY' I haven't auto_increment data, please help me!
asked Apr 14 Atik03 26.5k points
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1 answer 2 views
Problem: What exactly is an API key and what are its uses?
asked Apr 13 Humaira ahmed 50.7k points
0 votes
1 answer 15 views
Problem: ERROR 1062 (23000): Duplicate entry '2147483647' for key 'PRIMARY'.If bank_card is AUTO_INCREMENT why there is error?
asked Apr 13 Humaira ahmed 50.7k points
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1 answer 4 views
Problem: I need assistance in resolving this problem: what oracle object is used to manage auto-generated primary key?
asked Apr 7 rakib1 51.5k points
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1 answer 7 views
Problem: Can I have multiple primary keys in a single table?
asked Apr 4 nabin 4.6k points
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1 answer 3 views
Problem: Please solve it … Because I am unable to find out the solution... how to set primary key in access
asked Apr 4 Ifra 37.2k points
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1 answer 33 views
Problem: What are my options for dealing with this issue? cara mengatasi duplicate entry '0' for key 'primary'
asked Apr 1 rakib1 51.5k points
0 votes
1 answer 5 views
Problem: innodb_autoinc_lock_mode
asked Mar 24 Dan phillip 4.8k points
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1 answer 6 views
Problem: Need your help to solve this >'sql server add primary key to existing table' ?
asked Mar 20 Samiur1 38.4k points
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1 answer 14 views
Problem: Need your help to solve this >'does a table have to have a primary key' ?
asked Mar 18 sadi1982 36.3k points
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1 answer 7 views
Problem: Need your help to solve this >'postgres create table auto_increment primary key' ?
asked Mar 18 sadi1982 36.3k points
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1 answer 6 views
Problem: HELP! I need help understanding this: difference between primary index and secondary index in dbms
asked Mar 8 Rohit kr 17.5k points
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1 answer 5 views
Problem I have some confusion in the primary key and unique key Can anyone help me out here! What is the difference between a primary key and a unique key?
asked Mar 8 neeraj 10.5k points
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1 answer 36 views
Problem: Can anyone explain: What is the difference between primary key and unique key and foreign key?
asked Dec 21, 2020 prog_learner 2.5k points
0 votes
1 answer 21 views
What is the difference between primary key and foreign key in SQL?
asked Oct 11, 2020 sikandar 2.4k points