CREATE TABLE table_7847 ("Species" TEXT, "Species common name" TEXT, "NCBI Accession Number  ( mRNA/Protein ) " TEXT, "Length  ( bp/aa ) " TEXT, "Protein Identity" TEXT)

What is the NCBI Accession Number (mRNA/Protein) for the mus musculus Species?
SELECT "NCBI Accession Number (mRNA/Protein)" FROM table_7847 WHERE "Species" = 'mus musculus'
SELECT "NCBI Accession Number (mRNA/Protein)" FROM "table_7847" WHERE "Species" = 'mus musculus'