Conditions in ElasticSearch queries - elasticsearch

Question

I'm new to ElasticSearch. It seems pretty awesome, but I'm extremely confused by the JSON-based query language.
I am going to use ES as a document store. I am interested in making queries such "get all documents where age = 25", or "get all documents where name = 'john' and city = 'london'". However I have yet to understand how this can be done.
I can do this:
{
"query": {
"match": {
"age": "25"
}
}
}
But is this what I'm looking for? I think this would also return documents where age is "25 apples".
Please explain how one can issue such simpe queries against ES.

Answer 1

For age matching you can use term Query. Term Query looks for exact match.
{
"query": {
"term": {
"age": "25"
}
}
}

Answer 2

If you're afraid of the query DSL, you might be less afraid to use the query string mini-language (close to the Lucene query language) passed directly in the URI with the q= query string parameter, it might be a bit simpler to learn and event though it has some limitations, it allows you to go a long way.
For instance, in order to query all documents with age = 25, you 'd do it like this:
curl -XGET 'localhost:9200/_search?q=age:25'
For all documents with age between 25 and 30:
curl -XGET 'localhost:9200/_search?q=age:[25 TO 30]'
For all documents with age between 25 and 30 and the country US:
curl -XGET 'localhost:9200/_search?q=age:[25 TO 30] AND country:us'

Answer 3

To get all documents where (name = john and city = london).You can use following command:
GET /bank/account/_search?q=firstname:Rodriquez%20AND%20age:31
Or,You can also try Filters:
GET /demo/post/_search?pretty=true
{
"query": {
"filtered": {
"filter": {
"and": [
{
"term": {
"name": "john"
}
},
{
"term": {
"city": "london"
}
}
]
}
}
}
}