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【TcaplusDB知识库】WebClient用户如何读取和修改数据
2022-06-28 16:38:00 【InfoQ】
【TcaplusDB知识库】WebClient用户如何读取和修改数据
入口
说明
功能
遍历表格
指定key查询
部分字段查询
全字段查询
索引查询
约束
- 普通sql查询,支持 =,!=,>,>=,<,<=, like, not like, betwwen, in, not in, and, or, limit offset 等查询条件。这种方式的查询结果是一个或多个完整的数据。
- 聚合查询,支持 count, sum, max, min, avg 等查询方式。这种方式的查询结果是一个或者多个统计结果,如count的结果或者sum的结果。
- limit必须和offset连用且只能用于普通sql查询,不能用于聚合查询,且 limit + offset <= 10000,且 limit <= 3000。
- 未指定limit offset值时默认limit=10, offset=0。
- 查询结果中的count表示当前查询返回数据条数。
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