Cara menggunakan insert into mysql cmd

When supplying the data values to be inserted into the new table, the following should be considered:

• String data types – all the string values should be enclosed in single quotes.
• Numeric data types- all numeric values should be supplied directly without enclosing them in single or double-quotes.
• Date data types – enclose date values in single quotes in the format ‘YYYY-MM-DD’.

Suppose that we have the following list of new library members that need to be added to the database.

Let’s INSERT data one by one. We will start with Leonard Hofstadter. We will treat the contact number as a numeric data type and not enclose the number in single quotes.

INSERT INTO `members` (`full_names`,`gender`,`physical_address`,`contact_number`) VALUES ('Leonard Hofstadter','Male','Woodcrest',0845738767);

Executing the above script drops the 0 from Leonard’s contact number. This is because the value will be treated as a numeric value, and the zero (0) at the beginning is dropped since it’s not significant.

To avoid such problems, the value must be enclosed in single quotes as shown below –

INSERT INTO `members` (`full_names`,`gender`,`physical_address`,`contact_number`)  VALUES ('Sheldon Cooper','Male','Woodcrest', '0976736763');

In the above case, zero(0) will not be dropped

The query shown below demonstrates the above point.

INSERT INTO `members` (`contact_number`,`gender`,`full_names`,`physical_address`)  VALUES ('0938867763','Male','Rajesh Koothrappali','Woodcrest');

The above queries skipped the date of birth column. By default, MySQL will insert NULL values in columns that are omitted in the INSERT query.

Let’s now insert the record for Leslie, which has the date of birth supplied. The date value should be enclosed in single quotes using the format ‘YYYY-MM-DD’.

INSERT INTO `members` (`full_names`,`date_of_birth`,`gender`,`physical_address`,`contact_number`)  VALUES ('Leslie Winkle','1984-02-14','Male','Woodcrest', '0987636553');

All of the above queries specified the columns and mapped them to values in the MySQL insert statement. If we are supplying values for ALL the columns in the table, then we can omit the columns from the MySQL insert query.

Example:-

INSERT INTO `members`  VALUES (9,'Howard Wolowitz','Male','1981-08-24',
'SouthPark','P.O. Box 4563', '0987786553', 'lwolowitz[at]email.me');

Let’s now use the SELECT statement to view all the rows in the member’s table.

SELECT * FROM `members`;

Notice the contact number for Leonard Hofstadter has dropped the zero (0) from the contact number. The other contact numbers have not dropped the zero (0) at the beginning.

Inserting into a Table from another Table

The INSERT command can also be used to insert data into a table from another table. The basic syntax is as shown below.

INSERT INTO table_1 SELECT * FROM table_2;

Let’s now look at a practical example. We will create a dummy table for movie categories for demonstration purposes. We will call the new categories table categories_archive. The script shown below creates the table.

CREATE TABLE `categories_archive` (    	  `category_id` int(11) AUTO_INCREMENT,    	  `category_name` varchar(150)  DEFAULT NULL,    	  `remarks` varchar(500) DEFAULT NULL,    	  PRIMARY KEY (`category_id`)    	)

Execute the above script to create the table.

Let’s now insert all the rows from the categories table into the categories archive table. The script shown below helps us to achieve that.

INSERT INTO `categories_archive` SELECT * FROM `categories`;

Executing the above script inserts all the rows from the categories table into the categories archive table. Note the table structures will have to be the same for the script to work. A more robust script is one that maps the column names in the insert table to the ones in the table containing the data.

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