have some form of server-side or even client-side technology that can be used to filter out database query results which may contain NULL or empty values, using another language and that additional burden of ex
$arr[$i] = "NULL"; } ++$i; } mysql_connect($host,$username,$password) or die( "Unable to connect to database"); @mysql_select_db($database) or die( "Unable to select database"); // Add data into table $query1 = "INSERT INTO $table1 VALUES ('$LcNum', {$arr[1...
In MySQL NULL values are considered lower than any non-NULL value, therefore, NULL values appear first when the order is ASC (ascending), and ordered last when the order is DESC (descending). We'll be discussing the following two cases as sorting NULL values in either of the cases might...
mysql> INSERT INTO t1 VALUES (NULL, 'mothra'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO t2 VALUES (NULL, 'mothra'); Query OK, 1 row affected (0.00 sec) mysql> SELECT * FROM t1; +---+---+ | id | name | +---+---+ | NULL | mothra | +---+---+ 1...
mysql> INSERT INTO t1 VALUES (NULL, 'mothra'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO t2 VALUES (NULL, 'mothra'); Query OK, 1 row affected (0.00 sec) mysql> SELECT * FROM t1; +---+---+ | id | name | +---+---+ | NULL | mothra | +---+---+ 1...
7698 Blake Manager 7839 1981-05-01 2850 Null 30 7839 King President Null 1981-11-17 5000 Null 10 Inserting data in run timeTo insert the first row into table dept you can use the following statement:INSERT INTO demo.dept (deptno, dname, loc) VALUES (10,'Accounting','New York')The...
SELECT table_name, data_length, data_free FROM information_schema.tables WHERE table_schema='[schema_name]' ORDER BY data_free DESC;Copy The query displays the name of the table, the total space, and unused allocated space. By default, the values print in bytes. ...
Array data type in SQL server Array's IN SQL SERVER? ASCII values for extended characters Assign empty string '' if datetime is null Assign EXEC output to Variable Assigning NULL value to column name using Case Statement of where is SQL SERVER 2008 atomic if not exists() and insert or upd...
checking for non null values in a column checking if a connection is valid Checking if a specific handler exists Checking if an ObservableCollection contains a specific object Checking if command line arguments are empty. checking if elements with values exists in xml Checking overlaps on dates in...
Date: April 09, 2012 11:40AM drop table if exists t; create table t(name char(8),data char(8) default null); insert into t values('Name',null); select * from t; +---+---+ | name | data | +---+---+ | Name | NULL | +---+---+ Sorry, you can't reply to...