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75 lines
1.9 KiB
Plaintext
75 lines
1.9 KiB
Plaintext
-- Query all data from a table
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SELECT * FROM table_name;
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Query data from specified columns of all rows in a table
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SELECT column, column2... FROM table;
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-- Query data and select only unique rows
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SELECT DISTINCT (column) FROM table;
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-- Query data from a table with a filter
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SELECT * FROM table WHERE condition;
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-- Set an alias for a column in the result set
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SELECT column_1 AS new_column_1, ...
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FROM table;
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-- Query data using the LIKE operator
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SELECT * FROM table_name
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WHERE column LIKE '%value%'
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-- Query data using the BETWEEN operator
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SELECT * FROM table_name
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WHERE column BETWEEN low AND high;
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-- Query data using the IN operator
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SELECT * FROM table_name
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WHERE column IN (value1, value2,...);
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-- Constrain the returned rows with LIMIT clause
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SELECT * FROM table_name
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LIMIT limit OFFSET offset
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ORDER BY column_name;
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-- Query data from multiple using the inner join, left join, full outer join, cross join and natural join:
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SELECT * FROM table1 INNER JOIN table2 ON conditions
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SELECT * FROM table1 LEFT JOIN table2 ON conditions
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SELECT * FROM table1 FULL OUTER JOIN table2 ON conditions
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SELECT * FROM table1 CROSS JOIN table2;
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SELECT * FROM table1 NATURAL JOIN table2;
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-- Return the number of rows of a table.
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SELECT COUNT (*)
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FROM table_name;
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-- Sort rows in ascending or descending order
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SELECT column, column2, ...
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FROM table
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ORDER BY column ASC [DESC], column2 ASC [DESC],...;
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-- Group rows using GROUP BY clause.
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SELECT *
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FROM table
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GROUP BY column_1, column_2, ...;
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-- Filter groups using the HAVING clause.
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SELECT *
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FROM table
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GROUP BY column_1
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HAVING condition;
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-- Combine the result set of two or more queries with UNION operator:
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SELECT * FROM table1
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UNION
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SELECT * FROM table2;
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-- Minus a result set using EXCEPT operator:
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SELECT * FROM table1
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EXCEPT
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SELECT * FROM table2;
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-- Get intersection of the result sets of two queries:
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SELECT * FROM table1
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INTERSECT
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SELECT * FROM table2;
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