CQL offers a model similar to SQL. The data is stored in tables containing rows of columns. For that reason, when used in this document, these terms (tables, rows and columns) have the same definition that they have in SQL. Get started with Cassandra, fast.

2014年11月23日 · Simplistically, a Cassandra keyspace is a SQL database, and a Cassandra column family is a SQL table (CQL allows you to interchange the words “TABLE” and “COLUMNFAMILY” for convenience ...

2018年2月20日 · CQL is declarative like SQL and the very basic structure of the query component of the language (select things where condition) is the same. But there are enough differences that one should not approach using it in the same way as conventional SQL. The obvious items: 1. There are no joins or subqueries. 2. No transactions

2023年8月14日 · While cQL is similar to SQL as a query language, a key difference is how query results can be returned. In SQL, when tables with "to many" relationships are joined, the row data to the left of the join is duplicated for each joined row. cQL can return objects.

2025年2月16日 · cql 与 sql 的主要区别. 数据模型不同： sql：基于关系型数据模型，支持复杂的事务处理和多表联接。 cql：基于列族存储模型，更适合处理大规模分布式数据，不支持多表联接。 数据一致性：

CQL Syntax and Its Resemblance to SQL. Examining the syntax, CQL mirrors SQL in many ways, providing a level of comfort for developers rooted in SQL. SQL practitioners might find the approach to DELETE, SELECT, UPDATE, and INSERT statements familiar in CQL.

Instantly convert code snippets from Cassandra CQL to SQL with our free online code converter. Transform your code easily and accurately. Experience the full potential of AI-driven code conversion and transformation! Paste your Cassandra CQL code snippet into the input box. Click the "Convert" button to transform your code.

The CQL Transpiler is a tool for translating Clinical Quality Language (CQL) to its SQL equivalence. The transpiler itself doesn't actually produce SQL but instead translates each ELM operator into DBT/Jinja macro operator equivalents.

2018年8月28日 · Simplistically, a Cassandra keyspace is a SQL database, and a Cassandra column family is a SQL table (CQL allows you to interchange the words “TABLE” and “COLUMNFAMILY” for convenience). This difference necessitates a different syntax for creating and manipulating data: Creating databases: /* Create a new keyspace in CQL */

CDS Query Language (CQL) is based on standard SQL, which it enhances by... CQL allows to put projections, that means, the SELECT clause, behind the FROM clause enclosed in curly braces. For example, the following are equivalent: Postfix projections can be appended to any column referring to a struct element or an association and hence be nested.