无论是MySQL、PostgreSQL，还是Snowflake、BigQuery，只要会写SELECT，你就能和数据对话。它稳定、高效、逻辑清晰，是每个数据从业者的基本功。 这些需求，用SQL不是做不到，而是 成本太高 ——每换一个视角，就要重写一段逻辑；每加一个条件，就要多一层嵌套。更别说，结果还得手动导出、美化、发邮件。

Well, if you happen to be using Sql Server you can do that sort of thing in T-Sql. In Oracle, you can also accomplish the same thing using pl/sql. Either way i'd do it in a stored ...

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 ...

operand is one of the following: constant is a number or a quoted character string (or other special notation) that indicates a fixed value. Constants are also called literals. Constants are described ...

You don't have to give up using dynamic SQL just because you're using Entity Framework. The Entity Framework SqlQuery method will give you back the flexibility of dynamic SQL and still let you work ...

Do you want to find out how to avoid duplicates in the results of a SQL SELECT query? This article will show you how. Simply use the DISTINCT clause and between the SELECT clause and the fields.