Questions

How do I fix error 1062 in MySQL?

Standard

How do I fix error 1062 in MySQL?

1062 – Duplicate Entry To solve this, Set the primary key column as AUTO_INCREMENT . And when you are trying to insert a new row, ignore the primary key column or insert NULL value to primary key.

What is duplicate entry for key primary?

When creating a primary key or unique constraint after loading the data, you can get a “Duplicate entry for key ‘PRIMARY’” error. If the data in the source database is valid and there are no any duplicates you should check which collation is used in your MySQL database.

How do I ignore duplicate records in MySQL?

Use the INSERT IGNORE command rather than the INSERT command. If a record doesn’t duplicate an existing record, then MySQL inserts it as usual. If the record is a duplicate, then the IGNORE keyword tells MySQL to discard it silently without generating an error.

How do you delete a database in MySQL?

Deleting a MySQL or MariaDB database Use the command ‘SHOW DATABASES;’ in the mysql-console like in the example above. Now copy the name of the database you want to delete. To do delete a database you need the command ‘DROP DATABASE’. The syntax is similar to creating a database.

How do I auto increment a column in PHPMyAdmin?

How to Set Auto_increment in PHPMyAdmin

  1. First, select the database, table and the column (e.g, id) in which you want to set the auto_increment value.
  2. Next click on “Change” from the “Action” column.
  3. Now check the box “A_I” which means “Auto_Increment”.
  4. You should get a message like below:

Can primary key be duplicated?

A primary key is a series of unique values. So you can keep your duplicate data or you can have a primary key, but not both. Alternatively you can use a surrogate key, by adding an ID column to the table and populating it from a sequence.

Can we set multiple primary key in single table?

A table can have only ONE primary key; and in the table, this primary key can consist of single or multiple columns (fields).

How do I stop inserting duplicate records in SQL?

5 Easy Ways to Handle Duplicates Using SQL INSERT INTO SELECT

  1. Using INSERT INTO SELECT DISTINCT. The first option for how to identify SQL records in SQL is to use DISTINCT in your SELECT.
  2. Using WHERE NOT IN. Next, we populate the PastaDishes table.
  3. Using WHERE NOT EXISTS.
  4. Using IF NOT EXISTS.
  5. Using COUNT(*) = 0.

How can we avoid duplicate records in SQL without distinct?

Below are alternate solutions :

  1. Remove Duplicates Using Row_Number. WITH CTE (Col1, Col2, Col3, DuplicateCount) AS ( SELECT Col1, Col2, Col3, ROW_NUMBER() OVER(PARTITION BY Col1, Col2, Col3 ORDER BY Col1) AS DuplicateCount FROM MyTable ) SELECT * from CTE Where DuplicateCount = 1.
  2. Remove Duplicates using group By.

How do I delete a database in SQL server?

Using SQL Server Management Studio

  1. In Object Explorer, connect to an instance of the SQL Server Database Engine, and then expand that instance.
  2. Expand Databases, right-click the database to delete, and then click Delete.
  3. Confirm the correct database is selected, and then click OK.

How does MySQL auto increment work?

Auto Increment is a function that operates on numeric data types. It automatically generates sequential numeric values every time that a record is inserted into a table for a field defined as auto increment.

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