______ is used in operating system to separate mechanism from policy
<span><span>A. Single level implementation</span><span>B. Two level implementation</span><span>C. Multi level implementation</span><span>D. None</span></span>
Answer:
The Update statement in the DML is used for changing existing data in a table.
Explanation:
Their are following Sql statement in the DML.
Insert
This SQL statement is used for inserting data into the table.
select
This SQL statement is used for retrieving data from database
update
This SQL statement is used for updating data in a table.
delete
This SQL statement is used for delete data from database .
The "UPDATE" SQL statement in DML is used for Modify the data in the existing table .
Following are the syntax of Update SQL query
Update tablename
set column1=value1,column2=value2............column N=valueN
Where condition;
Example :Suppose we have student table and (rollno,name,age and add) are the field for that table we have to change the address of rollno 105
Then we use update query like that
UPDATE STUDENT
SET add='kalam nagar'
where rollno=105;
The answer to this question is the term Data Dictionary. A Data Dictionary or also known as metadata repository is a set of information that is stored which contains data, meanings, and values. The data dictionary can be used as a tool for communication between the stakeholders.
It depends because if you put a stamp on the envelope. But I think that it will still get to the destination. I think that it will either get sent to the destination or not. But you never know what is going to happen.
Dear ,you should ask it on stackoverflow and geekforgeelks , not here
