How To Create a New View

Q

How To Create a New View? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements

✍: FYIcenter.com

A

You can create a new view based on one or more existing tables by using the "CREATE VIEW viewName AS selectStatement" statement as shown in the following script:

mysql> CREATE TABLE comment (faqID INTEGER, 
   message VARCHAR(256));
Query OK, 0 rows affected (0.45 sec)

mysql> INSERT INTO comment VALUES (1, 'I like it');
Query OK, 1 row affected (0.00 sec)

mysql> CREATE VIEW faqComment AS SELECT f.id, f.title, 
   f.description, c.message FROM faq f, comment c 
   WHERE f.id = c.faqID;
Query OK, 0 rows affected (0.06 sec)

mysql> SELECT * FROM faqComment;
+----+-------------+-------------------------+-----------+
| id | title       | description             | message   |
+----+-------------+-------------------------+-----------+
|  1 | Learn MySQL | Visit dev.fyicenter.com | I like it |
+----+-------------+-------------------------+-----------+
1 row in set (0.07 sec)

2007-05-11, 5177👍, 0💬

How To Convert Dates to Character Strings
How To Convert Dates to Character Strings? - MySQL FAQs - Introduction to SQL Date and Time Handling You can convert dates to character strings using the DATE_FORMAT(date, format) function. MySQL supports the following basic formatting codes: %a Abbreviated weekday name (Sun..Sat) %b Abbreviated mon... 2007-05-11, 5656👍, 0💬

How To Write Date and Time Literals
How To Write Date and Time Literals? - MySQL FAQs - Introduction to SQL Date and Time Handling MySQL offers a number of formats for you to use to enter date and time literals: ANSI standard format: "YYYY-MM-DD HH:MM:SS". Non-standard limiters. Like: "YYYY/MM/DD HH^MM^SS" or "YYYY.MM.DD HH-MM-SS". No... 2007-05-11, 5248👍, 0💬

How To Create a New View
How To Create a New View? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements You can create a new view based on one or more existing tables by using the "CREATE VIEW viewName AS selectStatement" statement as shown in the following script: mysql> CREATE TABLE comment (faqID INTEGER, m... 2007-05-11, 5178👍, 0💬

How To Drop an Existing Index
How To Drop an Existing Index? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you don't need an existing index any more, you should delete it with the "DROP INDEX indexName ON tableName" statement. Here is an example SQL script: mysql> DROP INDEX tip_subject ON tip; Query OK, ... 2007-05-11, 5085👍, 0💬

What Are Date and Time Data Types
What Are Date and Time Data Types? - MySQL FAQs - Introduction to SQL Date and Time Handling MySQL supports the following date and time data types: DATE - A date in the range of '1000-01-01' and '9999-12-31'. Default DATE format is "YYYY-MM-DD". DATETIME - A date with the time of day in the range of... 2007-05-11, 5063👍, 0💬

How To Create a Table Index
How To Create a Table Index? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you have a table with a lots of rows, and you know that one of the columns will be used often as a search criteria, you can add an index for that column to improve the search performance. To add an ind... 2007-05-11, 5022👍, 0💬

How To Drop an Existing View
How To Drop an Existing View? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you have an existing view, and you don't want it anymore, you can delete it by using the "DROP VIEW viewName" statement as shown in the following script: mysql> DROP VIEW faqComment; Query OK, 0 rows ... 2007-05-11, 5007👍, 0💬

How To Get a List of Indexes of an Existing Table
How To Get a List of Indexes of an Existing Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you want to see the index you have just created for an existing table, you can use the "SHOW INDEX FROM tableName" command to get a list of all indexes in a given table. The tutor... 2007-05-11, 4939👍, 0💬

How To Drop an Existing Table
How To Drop an Existing Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you want to delete an existing table and its data rows, you can use the "DROP TABLE" statement as shown in the tutorial script below: mysql> SELECT * FROM tipBackup; +----+-------------+---------- ---... 2007-05-11, 4853👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.