Aug 28, 2024 · An alternate key (also known as secondary key) is a column or a combination of columns in a table that can uniquely identify each row, but is not the primary key. In other …

An Alternate Key, also known as a Candidate Key, is a column or set of columns in a database table that could potentially serve as the primary key. It's like having a backup superhero ready …

Dec 2, 2016 · To get the alternate records from a table you can run this query: Here I am using Row_number() to get the row number and applying modulus to it to categorize into even or …

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Dec 12, 2024 · Alternate Keys are an essential feature in SQL that helps maintain data uniqueness and integrity. While the Primary Key is the most important key used to uniquely …

Oct 4, 2023 · An alternative SQL query is a different approach to writing a SQL query that can effectively retrieve the same results as the original query. This can involve optimizations, …

Apr 17, 2025 · Alternate keys offer a way to uniquely identify records in a table using one or more fields other than the system-generated primary key (GUID). This feature is especially useful in …

Mar 16, 2017 · For large dataset like yours, using the following query may give your desired result with reasonable performance - First, the self-join creates a table by arranging all the status (3 …

Jul 25, 2024 · In MySQL, an alternate key is a column or set of columns that can uniquely identify a record, similar to a primary key, but isn't chosen as the primary key. Alternate keys ensure …

Aug 13, 2016 · What is an alternative to using subqueries in this SQL query that will give us better performance?