Talk:QUEL query languages

QUEL does not support relational algebraic operations such as intersection, minus or union inherently.

Errors

QUEL statements are always defined by tuple variables...

Not correct, the table can act as its own. In fact, the example could be written (more simply) as:

 create student (name = c10, age = i4, sex = c1, state = c2)
 append to student (name = "philip", age = 17, sex = "m", state = "FL")
 retrieve (student.all) where student.state = "FL"
 replace student (age=student.age+1)
 retrieve (student.all)
 delete student where student.name="philip"

retrieve into w is create table

To store the results of the retrieve in a new table, specify into tablename.(In interactive QUEL, if you do not specify into tablename, the result is displayed.) A table with this name (owned by the user) must not already exist. The current user is the owner of the new table.

I've updated code to

 create table w as
 select (e.salary / (e.age - 18)) as comp
 from employee as e
 where e.name = "Jones"

Sergeykish (talk) 09:14, 11 October 2020 (UTC)

References

Cites

[1] [2]

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