SQL includes a sub-language for defining schemas, the data definition language (DDL), along with a sub-language for modifying data, the data manipulation language (DML). Both of these have roots ...

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A data definition language (DDL) is a computer language used to ... However, it is considered to be a subset of SQL (Structured Query Language). SQL often uses imperative verbs with normal English ...

SQL databases have constraints on data types and consistency. NoSQL does away with them for the sake of speed, flexibility, and scale. One of the most fundamental choices to make when developing ...