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Category > Programming Posted 02 May 2017 My Price 5.00

Write an ALTER statement to add the column Area

a. Write an ALTER statement to add the column Area Code to EMPLOYEE. Assume that Area Code is not required.

b. Write an ALTER statement to remove the column Area Code from EMPLOYEE.

c. Write an ALTER statement to make Phone an alternate key in EMPLOYEE.

 

d. Write an ALTER statement to drop the constraint that Phone is an alternate key in EMPLOYEE.

Answers

Alpha Geek
(8)
Status NEW Posted 02 May 2017 06:05 PM My Price 5.00

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file 1493749406-answer1.docx preview (74 words )
a-----------. W-----------rit-----------e a-----------n A-----------LTE-----------R s-----------tat-----------eme-----------nt -----------to -----------add----------- th-----------e c-----------olu-----------mn -----------Are-----------a C-----------ode----------- to----------- EM-----------PLO-----------YEE-----------. A-----------ssu-----------me -----------tha-----------t A-----------rea----------- Co-----------de -----------is -----------not----------- re-----------qui-----------red-----------. -----------b. -----------Wri-----------te -----------an -----------ALT-----------ER -----------sta-----------tem-----------ent----------- to----------- re-----------mov-----------e t-----------he -----------col-----------umn----------- Ar-----------ea -----------Cod-----------e f-----------rom----------- EM-----------PLO-----------YEE-----------. -----------c. -----------Wri-----------te -----------an -----------ALT-----------ER -----------sta-----------tem-----------ent----------- to----------- ma-----------ke -----------Pho-----------ne -----------an -----------alt-----------ern-----------ate----------- ke-----------y i-----------n E-----------MPL-----------OYE-----------E. ----------- d.----------- Wr-----------ite----------- an----------- AL-----------TER----------- st-----------ate-----------men-----------t t-----------o d-----------rop----------- th-----------e c-----------ons-----------tra-----------int----------- th-----------at -----------Pho-----------ne -----------is -----------an -----------alt-----------ern-----------ate----------- ke-----------y i-----------n E-----------MPL-----------OYE-----------E. ----------- An-----------swe-----------r -----------The----------- de-----------sir-----------ed -----------sta-----------tem-----------ent-----------s a-----------re -----------as -----------wri-----------tte-----------n b-----------elo-----------w: ----------- AL-----------TER----------- TA-----------BLE----------- EM-----------PLO-----------YEE----------- AD-----------D
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