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O'Reilly Platform
book
Presto实战
by
Matt Fuller
,
Manfred Moser
,
Martin Traverso
March 2021
Intermediate to advanced
265 pages
6h 50m
Chinese
Posts & Telecom Press
Content preview from
Presto实战
115
第
8
章
在
Presto
中使用
SQL
在安装和运行
Presto
之后,你先在
3.6
节中了解了
Presto
一流的
SQL
支持中所包含的核心
功能。如有必要,可以回顾一下这部分内容。
在第
6
章中你知道了可以在
Presto
中用
SQL
查询很多数据源。
在本章中,你将深入了解
Presto
所支持
SQL
的细节
,包括一组
数据定义语言
(
data
definition
language
,
DDL
)语句
,它们用于创建和操作数据库对象,如
schema
、表、列和
视图。你还将学习更多的数据类型和
SQL
语句。在第
9
章中,
你将学习到更多操作符和函
数的高级用法。
总之,本章的目的不是作为
SQL
参考指南
,而是展示
Presto
中
SQL
的能力。关于
Presto
中
SQL
的最新和最完整的信息,可以参考
Presto
官方文档,参见
1.4.2
节。
你可以通过使用
Presto
CLI
或任何使用
JDBC
或
ODBC
驱动的应用程序来使
用
SQL
,这些都在第
3
章中讨论过。
连接器的影响
在
Presto
中执行的所有操作都依赖数据源的连接器及其对特定命令的支持。如果连接
数据源的连接器不支持
DELETE
语句,执行
DELETE
就会失败。
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Publisher Resources
ISBN: 9787115560056