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{
"name": "-",
"type": "operator",
"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"}
]
}