复制Cloud Studio 代码运行 MATCH (<node1-label-name>:<node1-name>),(<node2-label-name>:<node2-name>) CREATE (<node1-label-name>)-[<relationship-label-name>:<relationship-name> { <define-properties-list>}]->(<node2-label-name>) RETURN <relationship-label-name> 还是一系列键值对 示...
Python any(variable IN list WHERE predicate)返回值:Boolean判断list中的变量variable是否至少有一个满足predicate的判断,有一个满足就返回true;都不满足返回false;如果list本身是null则会返回null; 如果list中的值都是null则会返回null;exists()Python exists(pattern-or-property)返回值:Boolean...
P80 描述关系,不同类型和路径长度:(a)–(b); (a)-[r]-(b); (a)-[r:TYPE1|TYPE2]->(b); (a)-[2]->(b) P82 列表:list, range P84 列表推导式:list 推导式 P85 模式推导式 P86 Map 投射 P88 空值与真值表 NULL,AND,OR,XOR; 空值与 IN P92 函数 id(), type();其他函数 nodes() ...
(6)List操作 +, IN, [x], [x .. y], not actor in(7)正则操作 =~ //后面可使用正则表达式匹配规则(8)字符串匹配 STARTS WITH, ENDS WITH, CONTAINS(9)示例:(9.1)XOR使用 MATCH (n) WHERE n.name = 'Peter' XOR (n.age < 30 AND n.name = "Tobias") OR NOT (n.name = "Tobias" OR...
逻辑运算AND, OR, XOR, NOT 字符串操作+ List操作+, IN, [x], [x .. y] 正则操作=~ 字符串匹配STARTS WITH, ENDS WITH, CONTAINS 一:创建 创建节点 //创建可重复节点CREATE(n:Book{name:'三国演义',price:'30'})//创建不可重复节点(合并了MATCH和CREATE)MERGE(n:Book{name:'三国演义',price:'...
• fullpath: contains full representations of all nodes and relationships. Return_filter: • all • all_but_start_node Order: •breadth_first •depth_first Relationships: •all •in •out Uniqueness: • node_global • none ...
CONTAINS字符串包含 WITH ['John', 'Mark', 'Jonathan', 'Bill'] AS somenames UNWIND somenames AS names WITH names AS candidate WHERE candidate STARTS WITH 'Jo' RETURN candidate 布尔运算 conjunction: AND disjunction: OR, exclusive disjunction: XOR ...
字符串比较运算 STARTS WITH, ENDS WITH, CONTAINS 布尔运算 AND, OR, XOR, NOT 字符串运算 +字符串连接;=~ 正则匹配 时间运算 +, -,*, / Map运算 .静态获取value;[] 动态获取value List运算 +链表连接;IN判断是否在链表;[] 动态获取元素聚合运算DISTINCT...
in - item in list isnull - True IS NULL, False IS NOT NULL exact - string equals iexact - string equals, case insensitive contains - contains string value icontains - contains string value, case insensitive startswith - starts with string value ...
MAX_WORKERS=10NUM_ARTICLES=2000graph_documents=[]withThreadPoolExecutor(max_workers=MAX_WORKERS)asexecutor:# Submitting all tasks and creating a listoffuture objects futures=[executor.submit(process_text,f"{row['title']} {row['text']}")fori,rowinnews.head(NUM_ARTICLES).iterrows()]forfuture...