11 lines
		
	
	
		
			147 B
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			11 lines
		
	
	
		
			147 B
		
	
	
	
		
			Markdown
		
	
	
	
	
	
## Comparisons vs. Functions
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1. Improve the following query
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```
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SELECT count(*)
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FROM shawarma_purchases
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WHERE
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  YEAR(purchased_at) == '2017'
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```
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