{
  "name": "-",
  "type": "operator",
  "groups": ["Operators"],
  "description": "Subtraction of two values. If one of the values is NULL the result will be NULL.",
  "arguments": [{
    "arg": "a",
    "description": "value"
  }, {
    "arg": "b",
    "description": "value"
  }],
  "examples": [{
    "expression": "5 - 4",
    "returns": "1"
  }, {
    "expression": "5 - NULL",
    "returns": "NULL"
  }, {
    "expression": "to_datetime('2012-05-05 12:00:00') - to_interval('1 day 2 hours')",
    "returns": "2012-05-04T10:00:00"
  }],
  "tags": ["subtraction", "null", "result", "values"]
}