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INSERT INTO command:
Example:Insert the employee numbers, an increment amount of Rs.500/- and the increment date-today (which is being entered through function SYSDATE) of all the managers into a table INCR (increment due table) from the employee file.
INSERT INTO INCR SELECT EMPNO, 500, SYSDATE FROM EMP WHERE JOB = 'MANAGER';
Example: Insert values in a table using parameter substitution (& operator is used for it 1, 2 are the field numbers).
INSERT INTO EMP #VALUES (&1,'&2','&3', &4, &5, &6,NULL, &7);
Please note these values required to be supplied at run time.
UPDATE Command: Syntax is UPDATE = WHERE ;
The following variant of the primary copy asynchronous-update replication protocol has been proposed for totally replicated systems. (a) A transaction executing at site A updat
I have one assignment that has to be done in neo4j
Lack of Redundancy We have talked about the problems of repetition of information in a database. Such repetition should be stay away as much as possible. Let us state once again t
Is it mandatory to declare all the tables in Report by the key word tables for all the tables that exist in the structure of LDB, and are being explained in the Database part of LD
Cardinality of Relationship One-to-One Only one entity of the first set is linked to only one entity of the second set. E.g. A teacher teaches a student. Only one teacher
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
Example: //REVOKE ALL ON EMP FROM MCA12; (All permissions will be cancelled) You can also cancel only some of the permissions. Drop: A user-
What are the uses of functional dependencies? To test relations to see whether they are legal under a given set of functional dependencies. To state constraints on the set
Define single valued and multivalued attributes. Single valued attributes: attributes with a single value for a particular entity are known as single valued attributes. M
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
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