My post earlier this year on enabling query folding when using SQL queries as a data source in Power Query provoked a lot of interest. This post adds one more useful detail: how to preserve the ...

It’s surprisingly easy to stop query folding happening in Power Query by changing the data type of a column. This is mentioned in the docs here, and it’s something several people have blogged about ...

The ease and ubiquity of SQL have even led the creators of many “NoSQL” or non-relational data stores, such as Hadoop, to adopt subsets of SQL or come up with their own SQL-like query languages.

SQL queries and data are essential for database administration, but they also pose security risks if not handled properly. SQL injection, data leakage, unauthorized access, ...

(SELECT COUNT(*) FROM CovidData WHERE Province IS NULL) AS NullProvince, (SELECT COUNT(*) FROM CovidData WHERE Country_Region IS NULL) AS NullCountryRegion, (SELECT COUNT(*) FROM CovidData WHERE ...

1. What is a query in MySQL? In MySQL, a query is a request for data retrieval or manipulation from one or more tables in a database. It allows you to filter, sort, calculate, and summarize data based ...