Cassandra教程
1、创建表
基本语法：
create_table_statement ::= CREATE TABLE [ IF NOT EXISTS ] table_name
'('
column_definition
( ',' column_definition )*
[ ',' PRIMARY KEY '(' primary_key ')' ]
')' [ WITH table_options ]
column_definition ::= column_name cql_type [ STATIC ] [ PRIMARY KEY]
primary_key ::= partition_key [ ',' clustering_columns ]
partition_key ::= column_name
| '(' column_name ( ',' column_name )* ')'
clustering_columns ::= column_name ( ',' column_name )*
table_options ::= COMPACT STORAGE [ AND table_options ]
| CLUSTERING ORDER BY '(' clustering_order ')' [ AND table_options ]
| options
clustering_order ::= column_name (ASC | DESC) ( ',' column_name (ASC | DESC) )*
例子：
CREATE TABLE monkeySpecies (
species text PRIMARY KEY,
common_name text,
population varint,
average_size int
) WITH comment='Important biological records'
AND read_repair_chance = 1.0;
CREATE TABLE timeline (
userid uuid,
posted_month int,
posted_time uuid,
body text,
posted_by text,
PRIMARY KEY (userid, posted_month, posted_time)
) WITH compaction = { 'class' : 'LeveledCompactionStrategy' };
CREATE TABLE loads (
machine inet,
cpu int,
mtime timeuuid,
load float,
PRIMARY KEY ((machine, cpu), mtime)
) WITH CLUSTERING ORDER BY (mtime DESC);
2、修改表
3、删除表
标签： column、clustering、primary、posted、options
