Write a SQL query to show the names of all students who have studied both ECON123 and ECON456 (NOTE: ECON123 and ECON456 are values stored in Course_Number attribute).

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Q: sql query

A: Here have to determine about SQL query for given scenario.

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A: SUMMARY: - hence we discussed all the points

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A: Please refer to the following step for the complete solution of the problem above.

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A: The SQL queries are given in step 2.

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A: Please refer below for your reference: Queries are: 1. SELECT employee number, first name, job id…

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A:

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A: The queries for both questions given below

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A: Answer

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A: Here is the all query of the problem. See below steps for code.

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