How to avoid duplicate records in a query?
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In a table only one column how to update rows
Explain what is sql?
Practice 1: Changes to data will only be allowed on tables during normal office hours of 8.45 in the morning until 5.30 in the afternoon, MONDAY through FRIDAY. A. Create a procedure called SECURE_DML that prevents the DML statement from executing outside of normal office hours, returning the message: “you may only make changes during normal office hours” b. Create a statement trigger on the PRODUCT table which calls the above procedure. c. Test it by inserting a new record in the PRODUCT table.
What are wait events. Describe the wait event tables.
What is set serveroutput on?
what is indexing, searching and user interface?
what is the use of double ampersand (&&) in sql queries?
Which command is used to delete a trigger?
Can we use SQL%ISOPEN in implicit cursors? Does this attribute works properly in Implicit Curosors?
What does t sql mean?
What is sql table?
What is the difference between drop and truncate commands?
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