We have seen how to read data from a file, either in unstructured text or CSV format, and how to write data in these formats. We’ve also seen how to read and write JSON. In this chapter we’ll see how ...
Dynamic SQL lets you create a query string based off of user input. SQL Server allows you to create dynamic SQL statements. The statements use a SQL string varchar data type, then you execute the ...
A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...
Thanks to the technology behind ChatGPT, it’s become surprisingly simple to query a data set in plain English. As with most generative AI, results from OpenAI’s API are still imperfect, which means ...
Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...
Microsoft SQL Server 2017 (RTM-GDR) (KB4505224) - 14.0.2027.2 (X64) Jun 15 2019 00:26:19 Copyright (C) 2017 Microsoft Corporation Developer Edition (64-bit) on ...
Describe the problem you're observing: When selecting columns and rows and choosing export data -> export to SQL insert statements the mapping of columns is messed up. It seems like a column is ...
During optimization, the cardinality estimation process is responsible for estimating the number of rows processed at each step in an execution plan. Cardinality estimation uses a combination of ...
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