Update with condition : Update « Insert Delete Update « SQL / MySQL

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SQL / MySQL » Insert Delete Update » Update 
Update with condition
  
/*

mysql> select * from Bird;
+----------+-------+---------+------+------------+-------+
| name     | owner | species | sex  | birth      | death |
+----------+-------+---------+------+------------+-------+
| BlueBird | Joe   | Car     | f    | 1999-03-30 | NULL  |
+----------+-------+---------+------+------------+-------+
1 row in set (0.00 sec)

mysql> UPDATE Bird SET birth = '1989-08-31' WHERE name = 'BlueBird';
Query OK, 1 row affected (0.03 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from Bird;
+----------+-------+---------+------+------------+-------+
| name     | owner | species | sex  | birth      | death |
+----------+-------+---------+------+------------+-------+
| BlueBird | Joe   | Car     | f    | 1989-08-31 | NULL  |
+----------+-------+---------+------+------------+-------+
1 row in set (0.03 sec)


*/
Drop table Bird;

CREATE TABLE Bird (
    name VARCHAR(20)
    owner VARCHAR(20),
    species VARCHAR(20)
    sex CHAR(1)
    birth DATE, 
    death DATE
);
  
INSERT INTO  Bird VALUES ('BlueBird','Joe','Car','f','1999-03-30',NULL);
  
select from Bird;

UPDATE Bird SET birth = '1989-08-31' WHERE name = 'BlueBird';


select from Bird;

           
         
    
  
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4.Update with limitation and calculation
5.Update records with calculation based on two tables
6.Update two tables with calculation
7.Using UPDATE Statements to Modify Data in Joined Tables
8.UPDATE statement includes a WHERE clause
9.An UPDATE statement can be qualified by the use of the ORDER BY clause and the LIMIT clause.
10.Update statement using table name alias
11.Update value by calculation
12.Update statement with variable (ERROR 1093 (HY000): You can't specify target table 'PENALTIES' for update in FROM clause)
13.Update and order
14.Update with limit clause
15.UPDATE IGNORE
16.Update statement with case statement
17.Update statement with subquery (ERROR 1093 (HY000): You can't specify target table 'PENALTIES' for update in FROM clause)
18.Updates all rows with an InStock value of less than 30
19.Adding Subqueries to Your UPDATE Statements
20.Updating a joined table
21.When you update values in a joined table, you can update more than one value at a time
22.Joining Tables in an UPDATE Statement
23.A different join is defined in the UPDATE clause.
24.SET clause uses the Quantity column to specify the new value for that column
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