Vannini Marcus. - The 2016 Hitchhikers Reference Guide to SQL
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All control words (SQL specific) are capitalized for your reference. In general, SQL is not case sensitive for the control words (SELECT, DROP, UPDATE, etc.) and many DBs are not case sensitive for the table and field names, but your results may vary. A good convention is to upper case all control words, and match the case of all field names and table names, etc.
This book is designed as a reference book for people who already have a basic understanding of SQL, not complete beginners
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The 2016HitchhikersReference GuidetoSQLMarcus S. Vannini
HitchhikersTable of Knowledge Bombs & Intergalactic Gargleblasters
In general, SQL is not case sensitive for the control words(SELECT, DROP, UPDATE, etc.) and many DBs are not case sensitive for the tableand field names, but your results may vary. A good convention is to upper caseall control words, and match the case of all field names and table names, etc. This book is designed as a reference book for people whoalready have a basic understanding of SQL, not complete beginners.
SELECT ,....FROM - Select data from specific field(s) in a table 2. SELECT * FROM - Selects everythingfrom the table 3. SELECT FROM ORDER BY, .....ASC- Select data fromfield(s) then sorts in ascending order 4. SELECT FROM ORDER BY, ....DESC- Select data fromfield(s) then sorts in descending order 5. SELECT FROM WHERE- Select data using WHERE clause for a given condition. SELECT ... SELECT ...
FROM WHERE OR - Select datausing WHERE clause with OR for two given conditions. 7. SELECT FROM WHEREAND - Select data using WHERE clausewith AND for two given conditions. 8. SELECT FROM WHEREBETWEEN AND - Select data usingWHERE clause using BETWEEN with AND for two given values. 9.
SELECT FROM WHERE LEFT(,1)IN ('E', 'G', 'H')- Select data using WHERE clause surname starts with E,G or H) 10. SELECT FROM WHEREIS NULL;- Select data using WHERE clause with NULL 11. SELECT FROM WHERELIKE 'A*' OR LIKE 'B*'- Select datausing WHERE clause with LIKE 12. SELECT TOP 10* FROM ORDER BY DESC - Select data using ORDER BY with TOP to query asorted list 13. SELECT * FROM WHERE = 'O'' Neil'- Select data using double quotes to cancel out 'single quotes'
SELECT MAX() AS MaxField1,MAX() AS MaxField2 FROM 2. SELECT SUM() AS [TotalMarks] FROM 3. SELECT AVG() AS [AverageMark] FROM 4. SELECT MIN() AS [First First Name],MAX() AS [Last Surname] FROM 5. SELECT COUNT(*) AS [Number of Students] FROM 6. SELECT ROUND(AVG(YEAR(BDate)),2) AS AvgBDate FROM WHERE = 3
SELECT,,.... FROM,, WHERE = AND = This is a general SQL query combining TWO tables using WHEREclause 2. SELECT ,field2>, FROM INNER JOIN ON = (Alternative method) Returns all rows when there is at least one match in BOTHtables. 3. SELECT ,,FROM LEFT JOIN ON = General form of a LEFT JOIN Returns all rows from the lefttable, and the matched rows from the right table. 4.
SELECT ,,FROM RIGHT JOIN ON = General form of a RIGHT JOIN Returns all rows from the righttable, and the matched rows from the left table. 5. CREATE TABLE(,,,); General form for CREATING a table in a database
SQL SELECT STATEMENTS SELECT * FROM t SELECT c1,c2 FROM t SELECT c1,c2 FROM t WHERE conditions SELECT c1,c2 FROM t WHERE conditions ORDER BY c1 ASC,c2 DESC SELECT DISTICT c1,c2 FROM t SELECT c1, aggregate(c2 * c3) FROM t GROUP BY c1 SELECT c1, aggregate(c2 * c3) FROM t GROUP BY c1 HAVING c1 > v1 SQL OPERATORS SELECT * FROM t WHERE c1 [NOT] BETWEEN v1 AND v2 SELECT * FROM t WHERE c1 [NOT ] IN (v1,v2,) SELECT* FROM t WHERE c1 > v1 AND c1 < v2 SELECT * FROM t WHERE c1 < v1 OR c1 > v2 SELECT * FROM t WHERE c1 = v1 SELECT * FROM t WHERE c1 <> v1 SQL VIEW STATEMENTS CREATE UNIQUE INDEX idx ON t(c1,c2..) DROP INDEX t.idx SQL JOIN STATEMENTS SELECT * FROM t1 INNER JOIN t2 ON conditions SELECT * FROM t WHERE c1 [NOT ] IN (v1,v2,) SELECT * FROM t1 INNER JOIN t2 ON conditions WHERE conditions SELECT * FROM t1, t2 WHERE conditions SELECT * FROM t1 LEFT JOIN t2 ON conditions SELECT * FROM t1 RIGHT JOIN t2 ON conditions SELECT * FROM t1 FULL OUTER JOIN t2 ON conditions SELECT * FROM t1 AS at1 INNER JOIN t2 AS at2 ON at1.c1 = at2.c2 SQL TABLE STATEMENTS SQL TABLE STATEMENTS CREATE TABLE t( c1 dt1(l1), c2 dt2(l2), ... ) DROP TABLE t ALTER TABLE t ADD COLUMN c dt(l) ALTER TABLE t DROP COLUMN c SQL UPDATE DATABASE INSERT INTO t (c1,c2) VALUES (v1,v2) INSERT INTO t1 (c1,c2) SELECT c1,c2 FROM t2 WHERE conditions UPDATE t SET c1 = v1, c2 = v2, WHERE conditions DELETE FROM t WHERE conditions TRUNCATE TABLE t SQL VIEW STATEMENTS CREATE VIEW vw AS SELECT c1,c2 FROM t ALTER VIEW vw AS SELECT c1,c2 FROM t DROP VIEW vw
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