In: Proceedings of the ACM SIGMOD international conference on management of data, Boston, pp 23-34 Seshadri P, Paskin M (1997) Predator: An or-dbms with enhanced data types. In: Proceedings of the ACM SIGMOD international conference on management of data, Tucson, AZ, pp 568-571 Urhan T...
In this section you will find examples of queries in SQL and their equivalent in XML. These examples can be used as models to create custom queries. Since the XML queries are converted to Oracle SQL queries during the extraction process, you will find a table of reserved words that can not...
Database Users and User Interfaces in DBMS Difference Between DBMS and RDBMS ER-Diagram Model and Its Elements / Components in DBMS Conversion of ER Diagram to Relational Model Difference Between SQL and NoSQL Closure set of attribute and irreducible set of functional dependency ...
Here if I’m interested in looking at any of these, I can actually go in here and paste any of the SQL syntax that I need I also have the ability to do any of these here as well. If I choose, let’s say, the sales here, if I do any of these, and if I get any of the ...
Relational DBMSs allow users to extend the standard declarative SQL language surface using User Defined Functions (UDFs) that implement custom behavior. While UDFs offer many advantages, it is well-known amongst practitioners that they can cause severe degradation in quer...
MySQL returns no results because it considers the time of all dates inbirth_dateto be midnight. Instead, in this case, MSSQL and PostgreSQL behave as if the time isn’t there. The issue becomes even more complex when we want to consider time zones. Each database would require a separate...
First day of year is always 1-Jan. This query can be use in stored procedure where you quickly want first day of year for some calculation. SELECTTRUNC (SYSDATE,'YEAR')"Year First Day"FROMDUAL; Get the last day of the year Similar to above query. Instead of first day this query retu...
As compared to a streaming engine, a DBMS is more suitable for historic stream query processing. However, when using a DBMS, it is desirable to use a streaming query model to express the historic stream queries. It is not a good idea to express such queries directly in SQL for the follow...
emp; -- PL/SQL evaluates factor 12 13 LOOP 14 FETCH cv INTO sal, sal_multiple; 15 EXIT WHEN cv%NOTFOUND; 16 DBMS_OUTPUT.PUT_LINE('factor = ' || factor); 17 DBMS_OUTPUT.PUT_LINE('sal = ' || sal); 18 DBMS_OUTPUT.PUT_LINE('...
A table function construct expresses semantic matching queries in a declarative manner. The semantic matching queried are automatically rewritten or translated into standard SQL/XML search operators such as XQuery, XPath and XMLExists, and executed by the SQL/XML DBMS on the given instance data and...