SQL require a lot of programming.
SQL provides High-Speed Query Processing.
SQL follows the standard languages of ANSI and ISO.
SQL is easily portable.
A. SQL require a lot of programming.
If p comes between 0 to 25, data type becomes FLOAT(). If p comes between 26 to 54, data type becomes DOUBLE().
If p comes between 26 to 54, data type becomes FLOAT(). If p comes between 0 to 25, data type becomes DOUBLE().
If p comes between 25 to 53, data type becomes FLOAT(). If p comes between 0 to 24, data type becomes DOUBLE().
If p comes between 0 to 24, data type becomes FLOAT(). If p comes between 25 to 53, data type becomes DOUBLE().
A Primary Key cannot be NULL
A Foreign Key cannot be NULL
A Primary Key cannot be Duplicate
A Foreign Key can be Duplicate
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//
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25
26
25.65
25.00
SQL Equal Operator
SQL ANY Operator
SQL BETWEEN Operator
SQL IN Operator
Operator SQL _Operand
Operand2 SQL _Operator Operand1
Operand1 SQL _Operator Operand1
Operand1 SQL _Operator Operand2
LEN()
NOW()
MID()
FORMAT()
Rows
Database
View
All of the above
UPDATE
ADD
ALTER
JOIN
SQL DELETE ALL ROWS Table_Name;
SQL DELETE ROWS Table_Name;
DELETE FROM ALL ROWS Table_Name;
DELETE FROM Table_Name;
?
@
#
&
SELECT ()NOW;
NOW() SELECT;
SELECT NOW();
SELECT OWN();
Learning and understanding SQL is easy
It can also be used for communicating with the database.
In a few seconds, complex queries can also be answered using this language.
All of the above
Relational
Logical
Additional
Unique
SELECT Statement
UPDATE Statement
TRUNCATE TABLE Statement
FROM Statement
Table
Database
Row
Column
1
2
3
4
Systematic Treatment of Null Values
Guaranteed Access
View Updating
Physical Data Independence
Number
Character
Date
All of the above
First
Second
Third
Last
MySQL
PostgreSQL
Both A and B
None of the above
N
N-1
N-2
N+1
The data specified in this table or view is reported in this SQL statement.
Changes made in the SQL database transaction are permanently saved using this SQL statement.
Specify the columns of the table in this SQL statement to return distinct values.
By running this SQL statement, the transaction will be undone and the operations not yet saved to the SQL database will be undone.
-
_
!
&
By deleting the stored data, this SQL statement deletes the database.
A new table in SQL is created using this SQL statement.
The stored data in the SQL database is changed or modified by this SQL statement.
Columns in the SQL database can be created, deleted, or modified with this SQL statement.
DELETE
DISTINCT
FROM
WHERE
Following the completion of a transaction, it must be executed to save all the operations performed in the transaction.
A transaction can be rolled back to its last saved state.
A specific part of a transaction can be given a name
None of the above
UNIQUE
IDENTITY
INCREMENT
ADD
Using this command, you can remove or erase recorded information from a database table.
Database objects such as tables, table views, and other objects can be deleted using this command.
One or more rows from one or more tables of the database can be accessed with this command. Using the WHERE clause with this command is also possible.
It enables you to create new databases, tables, table views, and other objects using this command.
ROUND()
MID()
FORMAT()
NOW()