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Tag: null in sql

A Null value in a record represents an empty value in a database table. It differs from a value that is zero as this is an integer, and therefore not an empty value.

how to insert data into a table in SQL

Posted on March 9, 2021May 23, 2021 By admin No Comments on how to insert data into a table in SQL

After building your data using a create statement, one of the next steps using SQL is to now get your data in, so it can be managed and updated where necessary. There are many ways to import your data including , one you could use is import a CSV file with an SQL query. Here…

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SQL

How To Join Tables In SQL

Posted on February 20, 2021November 8, 2022 By admin No Comments on How To Join Tables In SQL

When running an sql select query, most likely we may have a need to bring in data from other tables. The reason for this is that tables have a specific purpose for the data they store. One of the most important features of a data architecture is to avoid duplication. This has the impact of…

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