In Feburary 2016 26,
Open MySQL monitor and log in with your username and password.
Select the database you wish to update. For example, to use the database named TARDIS, type in the following at the command prompt:use TARDIS;
Type in the SQL statement to update your column. To update the Date column of a table named 'Destination' where the Location is equal to 'Gallifrey' you can use the following SQL statement:UPDATE DestinationSET Date='2011-11-11'WHERE Location='Gallifrey';If updating more than one column, for example 'Date' and 'Time,' you can use the following statement:UPDATE DestinationSET Date='2011-11-11', Time='11:11:11'WHERE Location='Gallifrey';
Press Enter to submit the changes.
Update Columns Using phpMyAdmin
Open phpMyAdmin and log in.
Click the name of the database you wish to update columns for.
Find the table you'd like to change, and click on the 'Browse' icon next to it.
Put a check mark on all the records that need to be updated and click on the pencil icon or the 'Change' icon.
Edit the text on all the columns you wish to update and click on 'Go.'
In Feburary 2016 26,
Showing posts with label table. Show all posts
Showing posts with label table. Show all posts
Friday, 26 February 2016
Saturday, 20 February 2016
How to Add a Foreign Key to MySQLIn Feburary 2016 20,
In Feburary 2016 20,
Click the Windows 'Start' button and click 'All Programs.' Click 'MySQL' and then click 'MySQL Workbench' to open your main console.
Click 'Edit SQL Script' in the main console window. This opens a SQL editor where you create the foreign key.
Type the following code into your editor:alter table table_name add constraint key_name foreign keyreferences tbl_name primary_keyThe first line sets the foreign key. Replace 'table_name' with the name of your table. 'Key_name' is the name of the column in your table you want to set as the foreign key. The second line is the primary key information to link to the foreign key. Replace 'tbl_name' with the table that contains the primary key and 'primary_key' with the primary key column name.
Click 'Run' to run your SQL statement. The foreign key is created, and your tables are set up with the linked attributes.
In Feburary 2016 20,
Click the Windows 'Start' button and click 'All Programs.' Click 'MySQL' and then click 'MySQL Workbench' to open your main console.
Click 'Edit SQL Script' in the main console window. This opens a SQL editor where you create the foreign key.
Type the following code into your editor:alter table table_name add constraint key_name foreign keyreferences tbl_name primary_keyThe first line sets the foreign key. Replace 'table_name' with the name of your table. 'Key_name' is the name of the column in your table you want to set as the foreign key. The second line is the primary key information to link to the foreign key. Replace 'tbl_name' with the table that contains the primary key and 'primary_key' with the primary key column name.
Click 'Run' to run your SQL statement. The foreign key is created, and your tables are set up with the linked attributes.
In Feburary 2016 20,
SQL Scripting TutorialIn Feburary 2016 20,
In Feburary 2016 20,
Open up the database program of your choice. This could be Microsoft Access, SQL Server, or Oracle. Create a few sample fields, such as First Name, Last Name, Address, City, State, and Zip. Then add a few sample records to test on.
Write your first query by typing out 'SELECT
FROM table_name' where table_name is the name of the table you created. This example returns every value from every field in the table within your database (the
indicates all). You can also say 'SELECT field_name FROM table_name' to select only the field_name field from your table.
Add to your last statement with the WHERE clause. The WHERE clause specifies which fields you want to return based on a certain value. 'SELECT * FROM table_name WHERE last_name = 'Morgan' ' will search for 'Morgan' in the last_name field and returns all records from the table in which the person's last name is Morgan. Note that if you are searching for a string (letters or words), you will need single quotes around the name. If you are searching for a number, you don't need the quotes.
Add to your last statement once again by using the ORDER BY clause. 'SELECT
FROM table_name ORDER BY last_name' will order your recordset by the person's last name in alphabetical order. You can also do 'SELECT
FROM table_name ORDER BY age' and it will order by the person's age (add DESC after the field name you wish to order by to list the names in descending order).
Create a new query by typing the INSERT INTO statement. The INSERT INTO statement inserts a new row into the table that you specify. 'INSERT INTO table_name VALUES ('Courtney','Morgan',14)' will add the first name of Courtney, the last name of Morgan, and the age of 14 into your table. Likewise, if you want to delete someone from your table, you will use the DELETE statement. 'DELETE FROM table_name WHERE last_name = 'Morgan' AND first_name = 'Courtney' ' will delete Courtney Morgan from your table.
Create another new query. Use the UPDATE statement. This will update a record instead of adding or deleting one. 'UPDATE table_name SET address = '555 Hollywood Blvd', city = 'Los Angeles' WHERE last_name = 'Morgan' AND first_name = 'Courtney' ' will update Courtney Morgan's address to 555 Hollywood Blvd and her city to Los Angeles.
In Feburary 2016 20,
Open up the database program of your choice. This could be Microsoft Access, SQL Server, or Oracle. Create a few sample fields, such as First Name, Last Name, Address, City, State, and Zip. Then add a few sample records to test on.
Write your first query by typing out 'SELECT
FROM table_name' where table_name is the name of the table you created. This example returns every value from every field in the table within your database (the
indicates all). You can also say 'SELECT field_name FROM table_name' to select only the field_name field from your table.
Add to your last statement with the WHERE clause. The WHERE clause specifies which fields you want to return based on a certain value. 'SELECT * FROM table_name WHERE last_name = 'Morgan' ' will search for 'Morgan' in the last_name field and returns all records from the table in which the person's last name is Morgan. Note that if you are searching for a string (letters or words), you will need single quotes around the name. If you are searching for a number, you don't need the quotes.
Add to your last statement once again by using the ORDER BY clause. 'SELECT
FROM table_name ORDER BY last_name' will order your recordset by the person's last name in alphabetical order. You can also do 'SELECT
FROM table_name ORDER BY age' and it will order by the person's age (add DESC after the field name you wish to order by to list the names in descending order).
Create a new query by typing the INSERT INTO statement. The INSERT INTO statement inserts a new row into the table that you specify. 'INSERT INTO table_name VALUES ('Courtney','Morgan',14)' will add the first name of Courtney, the last name of Morgan, and the age of 14 into your table. Likewise, if you want to delete someone from your table, you will use the DELETE statement. 'DELETE FROM table_name WHERE last_name = 'Morgan' AND first_name = 'Courtney' ' will delete Courtney Morgan from your table.
Create another new query. Use the UPDATE statement. This will update a record instead of adding or deleting one. 'UPDATE table_name SET address = '555 Hollywood Blvd', city = 'Los Angeles' WHERE last_name = 'Morgan' AND first_name = 'Courtney' ' will update Courtney Morgan's address to 555 Hollywood Blvd and her city to Los Angeles.
In Feburary 2016 20,
Subscribe to:
Comments (Atom)