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What code do i write so that if i try to add another employee as a general manager, i get an error.

Thank youhi guys, if im going to create a table with derived column(meaning it's value is automatically created based from the value of another column from the table).

A query string is a way of passing information by appending data onto the URL.

updating mysql row-50 data | varchar(100) | YES | | NULL | | ------- -------------- ------ ----- --------- ------- 2 rows in set (0.00 sec) SHOW CREATE TABLE example; --------- ------------------------------------------------ | Table | Create Table | --------- ------------------------------------------------ | example | CREATE TABLE `example` ( `id` int(11) default NULL, `data` varchar(100) default NULL) ENGINE=My ISAM DEFAULT CHARSET=latin1 | --------- ------------------------------------------------ 1 row in set (0.00 sec)I want to create a table called 'Administrator' with primary key 'Admin ID' which is a varchar.

The table should have the following fields:surname,firstname,you please help me with the Mysql statement to do so.

Typically in a database program like this you'll end up updating rows based on the primary key of the database table.

Specifically, in this example, you'd probably already know the "id" for the user Fred, and when you go to update Fred's data, you would normally do it like this: ---- ------------ ----------- --------------------- ---------- ------------ | id | first_name | last_name | date_created | is_admin | num_points | ---- ------------ ----------- --------------------- ---------- ------------ | 2 | Fred | Flinstone | 2010-06-23 | 0 | 6000 | ---- ------------ ----------- --------------------- ---------- ------------ 1 row in set (0.00 sec) In "real world" Java database programs I almost always use the Spring JDBC libraries to access a database, but when you're first getting started, or working on small programs, I think it's important to see examples like this so you can understand how things work under the covers.

Is there a way that I can duplicate the required row, insert the the correct info i.e. so can u suggest v gud book which is free in downloading and tel best site where v can find various examples on queries.

Name and Store then update the row without touching information in the template, basically populating a new row with data from the template and then updating the necessary columns?

For example, if we wanted to send the variables age, sex, and wpm with values 20, f, 40 to our PHP script then our URL would look like: Now we need to build a new PHP script to take these variables and run a My SQL query for us.

We already changed the destination URL in our ajax method, now we need to make a script to grab those variables from the query string and execute a My SQL Query.

The left side of the equals operator is the variable name and the right side is the variable's value.

Also, each variable is separated with an ampersand &.

To keep it simple — but also show several different data types — I've created the following My SQL database table: create table users ( id int unsigned auto_increment not null, first_name varchar(32) not null, last_name varchar(32) not null, date_created timestamp default now(), is_admin boolean, num_points int, primary key (id) ); -- insert some sample records insert into users (first_name, last_name) values ('Fred', 'Flinstone'); insert into users (first_name, last_name) values ('Barney', 'Rubble'); A few of these fields are a little contrived, but I wanted to show several different data types in one table, so this is what I came up with.