php - Select unique from all columns into a single column -

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i have 4 columns setup have same type of data . want create table unique entries entries in columns. 

    c1 (name1)          c2 (name2)          c3 (name3) r1  r1 c1 (john)        r1 c2 (tiny tim)    r1 c3 (big sally) r2  r2 c1 (big sally)   r2 c2 (john)        r2 c3 (paul) r3  r3 c1 (tiny tim)    r3 c2 (paul)        r3 c3 (rajesh) r4  r4 c1 (normal ned)  r4 c2 (big sally)   r4 c3 (normal ned)

this need

    c1 r1  john r2  big sally r3  tiny tim r4  normal ned r5  rajesh r6  paul

you can using union keyword.

select c1 table union select c2 table union select c3 table;

the results ask.

then values , insert on new table or use insert ... select insert quickly.


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