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10 Cards in this Set
- Front
- Back
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What does SELECT do?
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SELECT Extracts data from a database.
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What does < >mean?
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< > means not equal.
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What does ORDER BY do?
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ORDER BY is when you want to sort your SQL result sets by some column(s).
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What does WHERE do?
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WHERE is used to select data conditionally, by adding it to already existing SQL SELECT query.
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What does >= mean?
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>= mean greater than equal to.
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What does LIKE mean?
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LIKE is when you want to specify a search condition within your SQL WHERE, based on a part of a column contents.
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What does GROUP BY mean?
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GROUP BY is used along with the SQL aggregate functions like SUM to provide means of grouping the result dataset by certain database table column.
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What does OR & AND mean?
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AND is used when you want to specify more than one condition in your WHERE, and at the same time you want all conditions to be true.
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What does <= mean?
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<= mean less than or equal to.
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What does UPDATE mean?
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UPDATE changes the data in already existing database row(s) and usually we need to add a conditional SQL WHERE clause to our SQL UPDATE statement in order to specify which row(s) we intend to update.
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