Read this SQL tutorial to learn when ... Table3.column1 restricts the data returned even though no data from this table makes it to the result set. Note that table3 must be referenced in the ...

SQL has dominated data querying for decades. Newer query languages offer more elegance, simplicity, and flexibility for modern use cases. For the last three decades, databases and Structured Query ...

Analyze database contents using basic, intermediate and advanced SQL statement syntax and usage. Demonstrate capability to query data from multiple tables using SQL JOINS. Create and modify database ...

The Structured Query Language or SQL as it is more popularly ... SQL and doesn’t cover the basics. Also note that the trainer uses the PostgreSQL database in the course and covers installation ...

The ACID (Atomic-Consistent-Independent-Durable) transactions of the relational model make it virtually impossible to scale across data centers while maintaining ... these new databases shunned SQL as ...

I’ve created a script that monitors a table in a SQL Server database. I’m only interested in one column in the table: TimeStamp. If the maximum (newest) value in TimeStamp is more than 30 ...

That capability is enhanced in SQL Server 2016, the first-ever version that lets developers query within JSON strings as if the JSON were organized into individual columns. What's more, you can read ...

Here's a look at different ways to query Hadoop via SQL, some of which are part of the latest edition of MapR's Hadoop distribution SQL: old and busted. Hadoop: new hotness. That’s the ...

Note: The order in which processing occurs is not the same as the order of the statements in the example. The first SELECT statement (the PROC SQL query) displays and formats the data that is ...