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Khóa học miễn phí DocumentDB – Scalar Expressions nhận dự án làm có lương

DocumentDB SQL – Scalar Expressions In DocumentDB SQL, the SELECT clause also supports scalar expressions like constants, arithmetic expressions, logical expressions, etc. Normally, scalar queries are rarely used, because they don”t actually query documents in the collection, they just evaluate expressions. But it”s still helpful to use scalar expression queries to learn the basics, how […]

Khóa học miễn phí DocumentDB SQL – Built-in Function nhận dự án làm có lương

DocumentDB SQL – Built-in Function DocumentDB supports a host of built-in functions for common operations that can be used inside queries. There are a bunch of functions for performing mathematical calculations, and also type checking functions that are extremely useful while working with varying schemas. These functions can test if a certain property exists and […]