Because HBase only support the column family nest the column qualifier, it is hard to deal with the situation of Multiple Nested after data migration from relational database meanwhile ensure high ...

In the software industry, Structured Query Language (SQL) remains a highly sought-after skill required by most employers. SQL is widely adopted as the preferred declarative language to manipulate data ...

The SQL tag is a very handy feature of the new versions, once I've had to simulate earlier through code. I think SQL queries are one of the few ideal cases for using the power of tagged templates.

The SQL of many databases does not have a convenient way to generate a month sequence, and many databases require multiple nested queries and window functions to indirectly implement it. Retain ...