supervisor O b. O d. SELECT Efname as Efname. E.kdate as Ebdate FROM Employee E WHERE E.bdate < ALL (select Sabdate. from Employee s where E.super ssn. < S.Ssn); SELECT Efname as Efname, E.bdate as Ebdate FROM Employee E JOIN EMPLOYEES ON E.Super 5.5 WHERE E.bdate <$,bdate; SELECT Efname as Efnane, E.bdate as Ebdate FROM Employee F WHERE > ALL (select Subulate from where Employee S super 550, < 5.550); SELECT Efname as Efnane, Ebdate as Ebdate FROM Employee C 30IN CMPLOYEES ON EAURAC_0 WHERE Ebate (select from where date Employee s super..san. = S.Ssn);
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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