Draw the ERD _that is implemented by the following SQL code: CREATE TABLE PROJ_USER USER_ID NUMBER NOT NULL, USER_NAME VARCHAR2(50) NOT NULL, USER_EMAIL VARCHAR2(50) NOT NULL, CONSTRAINT USER_PK PRIMARY KEY (USER_ID) CREATE TABLE PROJ_CERTIFIEDUSER USER_ID NUMBER NOT NULL, CUSER_REALNAME VARCHAR2(50) NOT NULL, CUSER_CERTIFICATION VARCHAR2(50) NOT NULL, CONSTRAINT CERTIFIEDUSER_PK PRIMARY KEY (USER_ID), CONSTRAINT CERTIFIEDUSER_FK FOREIGN KEY (USER_ID) REFERENCES PROJ_USER (USER_ID)
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
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