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What Count function return in SQL?
Count function within SQL returns the number of values. (Count function counts all the not null values in the exact column. If we need to count just distinct values than the DISTINCT keyword is also to be used)
What are the benefits of prepared statements and place holders? Parameter binding operations automatically handle escaping of characters Encourage Statement reuse
What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa
System level permissions : With the use of data dictionary you can view them. Let us take the table name as user_sys_privs (used in oracle). DESCRIBE USER_SYS_PRI
, write the relational schema, and draw the new dependency diagrams. Identify the normal forms for each table structure you created
What is data block? Data Block - In oracle the data blocks are referred to as tablespaces. A tablespace is an fields of disk consisting of one or more disk files. A tablespace
sql is relationally complete-justify
I want to fragment existing table using java code... help me..!!
Question 1 Discuss the classification of DBMS based on location of database Question 2 Explain with examples different SQL commands used for creating and deleting relations.
explain three types of internet risks to the consummers whent he business system is data dependent. how can we minimise these risks
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