CREATE TABLE table_7595 ("Format name" CLOB, "Container" CLOB, "Video coding" CLOB, "Bit depth" FLOAT, "Color sampling" CLOB, "Frame size" CLOB, "Video bit rate ,  Mbit/s" CLOB, "Audio coding" CLOB)

What bit depth has 4:1:1 as the color sampling?
SELECT SUM("Bit depth") FROM table_7595 WHERE "Color sampling" = '4:1:1'
SELECT SUM("Bit depth") FROM "table_7595" WHERE "Color sampling" = '4:1:1'