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			20 lines
		
	
	
		
			1015 B
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
			
		
		
	
	
			20 lines
		
	
	
		
			1015 B
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
{
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  "name": "hour",
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  "type": "function",
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  "groups": ["Date and Time"],
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  "description": "Extracts the hour part from a datetime or time, or the number of hours from an interval.",
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  "variants": [
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  { "variant": "Time variant",
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      "variant_description": "Extracts the hour part from a time or datetime.",
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      "arguments": [ {"arg":"datetime","description":"a time or datetime value"}],
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      "examples": [ { "expression":"hour( to_datetime('2012-07-22 13:24:57') )", "returns":"13"}] },
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      {
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      "variant": "Interval variant",
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      "variant_description": "Calculates the length in hours of an interval.",
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      "arguments": [ {"arg":"interval","description":"interval value to return number of hours from"}],
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      "examples": [ { "expression":"hour(to_interval('3 hours'))", "returns":"3"},
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                    { "expression":"hour(age('2012-07-22T13:00:00','2012-07-22T10:00:00'))", "returns":"3"},
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                    { "expression":"hour(age('2012-01-01','2010-01-01'))", "returns":"17520"}]
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  }]
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}
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