if you have table names(id, first_name, last_name) then ID column’s first value will be 1 and it will increment every time by 1. But sometimes you may need to set initial value and auto increment in MySQL
BTW - I am interested in hearing why you need this sequence feature. What problems are you guys solving with that that you can't solve with an auto_increment. Just curious... kind regards, Roland Bouman http://rpbouman.blogspot.com/Navigate...
ALTERTABLEEmployeesAUTO_INCREMENT=new_value; We can set anew_valueas the default beginning value like this: ALTERTABLEEmployeesAUTO_INCREMENT=1001; In this case, the initial value we want to utilize isnew_value. We give a new interval value to the MySQL server variableAUTO_INCREMENTto modify th...
Auto-increment is a very important attribute of MySQL. When a table requires a numeric field that will increment automatically to generate a sequential number then the auto-increment attribute is used for that field. The auto-increment field can be assigned as the primary key or unique key for...
CREATE TABLE test_table ( id INT(20) NOT NULL AUTO_INCREMENT, name VARCHAR(32) NOT NULL DEFAULT '', other INT(20) NOT NULL DEFAULT '0', PRIMARY KEY (id), INDEX name (name), INDEX other_key (other) ) ENGINE=MyISAM DEFAULT CHARSET=latin1; ...
mysql> CREATE DATABASE sample_db; Switch to the sample_db database. mysql> USE sample_db; Create a new table named states. mysql> CREATE TABLE states ( id BIGINT PRIMARY KEY AUTO_INCREMENT, name VARCHAR(255), country VARCHAR(255) ) ENGINE = InnoDB; Create a new table named state_popu...
” As a general rule, other than in SET statements, you should never assign a value to a user variable and read the value within the same statement. For example, to increment a variable, this is okay: SET @a = @a + 1. For other statements, such as SELECT, you might get the re...
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Now I have a query, that if multiple threads (and multiple connections from different browser clients) try to access and increment ItemCount as follows: Update Table_Test Set ItemCount = ItemCount + 1 Where ItemId = <ItemId>; In above case when two client connections try to update ...