Category Archives: documentdb Sql

Khóa học miễn phí DocumentDB SQL – Iteration nhận dự án làm có lương

DocumentDB SQL – Iteration In DocumentDB SQL, Microsoft has added a new construct which can be used with IN keyword to provide support for iterating over JSON arrays. The support for iteration is provided in the FROM clause. We will consider similar three documents from the previous examples again. Following is the AndersenFamily document. { […]

Khóa học miễn phí DocumentDB SQL – Aliasing nhận dự án làm có lương

DocumentDB SQL – Aliasing In relational databases, SQL aliases are used to temporarily rename a table or a column heading. Similarly, in DocumentDB, aliases are used to temporarily rename a JSON document, sub-document, object or any field. The renaming is a temporary change and the actual document does not change. Basically, aliases are created to […]

Khóa học miễn phí DocumentDB SQL – Joins nhận dự án làm có lương

DocumentDB SQL – Joins In relational databases, the Joins clause is used to combine records from two or more tables in a database, and the need to join across tables is very important while designing normalized schemas. Since DocumentDB deals with the denormalized data model of schema-free documents, the JOIN in DocumentDB SQL is the […]