Convert values in designated columns (lc1, lc1_spec, lu1, lu1_type, lc2, lc2_spec, lu2, lu2_type, cprn_lc) to uppercase for consistency's sake
Upper_case(con, years)
Connection to db
Numeric vector of years to be harmonised
To create the conection please see Connect_to_db
# NOT RUN { Upper_case(con,c(2009, 2012, 2015, 2018)) # }
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