Neo4j: Getting Started Basics (2) ~ Data Import into Neo4J

Neo4j imports data in the following ways:

1. Cypher create statement, write a create for each piece of data
2. The Cypher load csv statement converts the data into CSV format and reads the data through LOAD CSV.
3. neo4j-admin import import
4. Official Java API - BatchInserter
5. The batch-import tool written by Daniel
6. neo4j-apoc　　load.csv + apoc.load.relationship

Customized development for actual business scenarios:

CSV file import

Reference:  Neo4j: Getting Started Basics (2) Importing CSV Files_Dawn_www's Blog-CSDN Blog_neo4j Importing CSV Files

Import RDF into neo4j database

The difference between neo4j-admin and neo4j-import for data import

Note: There are currently two commonly used methods for batch importing data. There are some differences between the neo4j-import provided by the new version and the neo4j-admin import upgraded from the old version, but there is not much difference in the efficiency of importing data. different.

neo4j-admin parameter

usage: neo4j-admin import [--mode=csv] [--database=<name>] //模式，默认csv
                      [--additional-config=<config-file-path>]
                      [--report-file=<filename>]
                      [--nodes[:Label1:Label2]=<"file1,file2,...">] //实体文件
                      [--relationships[:RELATIONSHIP_TYPE]=<"file1,file2,...">] // 关系文件
                      [--id-type=<STRING|INTEGER|ACTUAL>]
                      [--input-encoding=<character-set>] // 编码格式
                      [--ignore-extra-columns[=<true|false>]] // 忽略多余列参数
                      [--ignore-duplicate-nodes[=<true|false>]] // 忽略重复节点参数
                      [--ignore-missing-nodes[=<true|false>]] // 忽略丢失的节点参数

or

bin/neo4j-import [--into]  
                 [--id-type=<STRING|INTEGER|ACTUAL>]
                 [--nodes[:Label1:Label2]=<"file1,file2,...">] //实体文件
                 [--relationships[:RELATIONSHIP_TYPE]=<"file1,file2,...">] // 关系文件

Neo4j multi-library switching

• Method 1: Because Neo4j’s import can only import a non-existing db, when you want to create multiple libraries, you need to switch. The default library of Neo4j is graph.db, in ./conf/neo4j.conf can be modified

# Neo4j configuration
#
# For more details and a complete list of settings, please see
# https://neo4j.com/docs/operations-manual/current/reference/configuration-settings/
#*****************************************************************

# The name of the database to mount
#dbms.active_database=graph.db

• Method 2: To switch multiple libraries, reconnect the new library to the default library graph.db, and then restart Neo4j

//软连接
cd ./data/databases/
ln -s graph_kg.db graph.db

//重启neo4j
cd $NEO4j_HOME/bin
./neo4j restart

// 删除软连接
ln-s test_chk  test_chk_ln
rm -rf  ./test_chk_ln