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Null
Sql is null or empty
Is NULL or empty SQL? What is the difference between NULL and Blank ? ... Null can be a unknown value or an absence of a value, where as an Empty or B...
Is null sql
IS NULL meaning SQL? Null or NULL is a special marker used in Structured Query Language to indicate that a data value does not exist in the database. ...
Is null mysql
IS NULL function in MySQL? The MySQL ISNULL() function is used for checking whether an expression is NULL or not. This function returns 1 if the expre...
What is a Null Value and when are Null values used?
When can a NULL value be used? You know that the value should be zero. Think of NULL as “unknown.” You can use NULL values for any data type including...
What is 0 in c
What is a 0 in C? So in C programming language string is basically a character array. '\0' is the terminating character of a string. We can also make ...
Null coalescing operator php
What is a Null coalescing operator PHP? The Null coalescing operator is used to check whether the given variable is null or not and returns the non-nu...
Null attribute in er diagram
What is null ERD? The NULL value represents a missing or undefined value. When a foreign key contains NULL value it means that it does not refer to an...
What is the purpose of a null modem cable?
What is null modem why it is used how it is configure? The null modem configuration is used to connect two hosts together directly. There are no modem...
What is this java.lang.NullPointerException?
What is a NullPointerException and what causes it? NullPointerException is a RuntimeException . In Java, a special null value can be assigned to an ob...