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Relating multiple tables
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About SQL strings
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Finding the length of a string
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Selecting part of a string
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Removing spaces
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What type is that value
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Integer division
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Rounding numbers
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Dates and times
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Date- and time-related functions
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What are aggregates
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Using aggregate functions
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Aggregating DISTINCT values
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What are transactions
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Data integrity
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Automating data with triggers
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Preventing updates