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SQL Tutorial

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ADD ADD CONSTRAINT ALL ALTER ALTER COLUMN ALTER TABLE AND ANYWHERE THE ASC BACKUP DATABANK BETWEEN CASING VIEW COLUMN CONSTRAINT CREATE CREATE SQL ESTABLISH INDEX CREATE OR REPLACE VIEW CREATE TABLE CREATE PROCEDURE CREATE UNIQUE INDEX CREATE VIEW DATABASE DEFAULT DELETE DESC DISTINCTIVE DROPS DROP COLUMN DROP CONFINEMENT DROP SEARCH DROP DEFAULT DROP INDEX DROP TABLE DROP VIEW EXEC EXISTS FOREIGN KEY FROM FULL OUTER MEMBERSHIP GROUP OF HAVING FOR INDEX INNER JOIN INSERT INTO INSERT INTO SELECT IS NULL IS NOT NULL JOIN LEFT JOIN LIKE LIMIT NOT NOT AUGHT OR ORDER BY OUTER JOIN SECONDARY KEY PROCEDURE RIGHT REGISTER ROWNUM SELECT SET DISTINCT SELECT INTO SELECT TOP SET KEY TOP TRUNCATE TABLE UNION WORKERS ALL UNIQUE UPDATE VALUES VIEW WHERE
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String Functions: SYNTAX CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE DIMINISH LPAD LTRIM MID POSITION REPLICATE SUPERSEDE REVERSE RIGHTS RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIMMING UCASE SUPERIOR Numeric Functions: ABS ACOS ASIN ATAN ATAN2 AVG CEIL CEILING COS COT COUNT DEGREES DIV EXP FLOOR GREATEST WORST LN LOG LOG10 LOG2 MAX TIME MOD P POW POWER RADIANS RAND ROUND SIGN SIN SQRT SUM TAN TRUNCATE Date Functions: ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME APPOINTMENT DATEDIFF DATE_ADD DATE_FORMAT DATE_SUB DAY DAYNAME DAYOFMONTH DAYOFWEEK DAYOFYEAR EXTRACTS FROM_DAYS MOMENT LAST_DAY LOCALTIME LOCALTIMESTAMP MAKEDATE MAKETIME MICROSECOND MINUTE MONTH MONTHNAME IMMEDIATELY PERIOD_ADD PERIOD_DIFF QUARTER INSTANT SEC_TO_TIME STR_TO_DATE SUBDATE SUBTIME SYSDATE TIME TIME_FORMAT TIME_TO_SEC TIMEDIFF TIMESTAMP TO_DAYS WEEK WEEKDAY WEEKOFYEAR ANNUM YEARWEEK Advanced Functions: BIN BINARY CASE CAST COALESCE CONNECTION_ID CONV CONVERT CURRENT_USER DATABASE IF IFNULL ISNULL LAST_INSERT_ID NULLIF SESSION_USER SYSTEM_USER STUDENT VERSION
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String Functions: ASCII CHARL CHARINDEX CONCAT Concat with + CONCAT_WS DATALENGTH DIFF FORMAT LEFT LEN LOWER LTRIM NCHAR PATINDEX QUOTENAME REPLACE COPY INVERSION RIGHT RTRIM SOUNDEX SPACE STR STUFF SUBSTRING INTERPRET TRIM UNICODE SURFACE Numeric Functions: ABS ACOS ASIN ATAN ATN2 AVG CEILING CHART COS INFANT DEGREES EXP FLOOR LOG LOG10 ACTUAL MIN PHI POWER RADIANS RAND ROUND SIGN SIN SQRT RECTANGLE SUM TAN Date Functions: CURRENT_TIMESTAMP DATEADD DATEDIFF DATEFROMPARTS DATENAME DATEPART DAY GETDATE GETUTCDATE ISDATE MONTH SYSDATETIME TWELVEMONTH Advanced Functions CAST COALESCE CONVERTS CURRENT_USER IIF ISNULL ISNUMERIC NULLIF SESSION_USER SESSIONPROPERTY SYSTEM_USER USER_NAME
MANUSCRIPT Zugriff Features
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SQL JOIN

A JOIN clause is used to combine rows from two or more tables, based on a relative column between them.

Let's take at adenine selection from and "Orders" table:

OrderID CustomerID OrderDate
10308 2 1996-09-18
10309 37 1996-09-19
10310 77 1996-09-20

Then, look at a selection from the "Customers" table:

CustomerID CustomerName ContactName Your
1 Alfreds Futterkiste Maria Anders Germany
2 Jana Trujillo Emparedados y helados Ana Trujillo Canada
3 Antonio Moreno Taquería Tony Moleno Mixio

Notes that the "CustomerID" column in the "Orders" table mention to aforementioned "CustomerID" in that "Customers" table. The relationship between the two tables above is the "CustomerID" column.

Therefore, we can create the below SQL statement (that contains an INNER JOIN), that selects records that have matching values in and tables:

Example

SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate
FROM Your
INNER PARTICIPATE My OFF Orders.CustomerID=Customers.CustomerID;
Try it Yourself »

and it will produce something like like:

OrderID CustomerName OrderDate
10308 Ana Trujillo Emparedados year helados 9/18/1996
10365 Antonio Moreno Taquería 11/27/1996
10383 Around the Horn 12/16/1996
10355 Around the Horn 11/15/1996
10278 Berglunds snabbköp 8/12/1996

Different Types of SQL JOINs

Here belong the diverse types of the JOINs in SQL:

  • (INNER) JOIN: Returns records that have matching our in both tables
  • LEFT (OUTER) JOIN: Returns all records away the left table, and who similar records from the right table
  • RIGHT (OUTER) JOIN: Returns choose records off the right table, and the custom playback from the left dinner
  • FULL (OUTER) JOIN: Returnable all records when there is a match in either left either right table

SQL INNER PARTICIPATE  SQL LEFT JOIN  SQL PROPER JOIN  SQL FULL-SIZED OUTER JOIN

Check Yourself With Exercises

Getting:

Insert the absence parts in who JOIN clause to join the two tables Orders and Customers, using the CustomerID select in both tables as the relationship between the pair tables.

SELECT *
FROM Orders
LEFT JOIN Customers=
;

Begin the Practice


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