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10-14-2021 07:01 PM
I am a newbie to Neo4j. I am importing data from a CSV file and want to create a nodes for Email and Phone number separately only if these columns are not null. So if I am creating say
load csv with headers from "file:///af_20211014.csv" as csv merge (e : Email {email: csv.email})
It is generating an error when the email column is empty. How to overcome that?
Extending on the above, how can I use a cypher to not create a field in a node if the value is not present in CSV column. To be specific, here is the query I am currently using to create a Person node from same above file and I don't want to use coalesce, in case of null, jus don't create the property ; merge (p : Person {full_name: coalesce(csv.full_name,'BLANK'), dob: coalesce(date(csv.dob),'No DOB')})
10-14-2021 10:36 PM
Try this:
load csv with headers from "file:///af_20211014.csv" as csv
FOREACH(ignoreMe IN CASE WHEN csv.email is not null THEN [1] ELSE [] END|
merge (e : Email {email: csv.email})
)
FOREACH(ignoreMe IN CASE WHEN csv.full_name is not null and csv.dob is not null THEN [1] ELSE [] END|
merge (p : Person {full_name: csv.full_name, dob: date(csv.dob})
)
FOREACH(ignoreMe IN CASE WHEN csv.full_name is not null and csv.dob is null THEN [1] ELSE [] END|
merge (p : Person {full_name: csv.full_name}
)
FOREACH(ignoreMe IN CASE WHEN csv.full_name is null and csv.dob is not null THEN [1] ELSE [] END|
merge (p : Person {dob: date(csv.dob})
)
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