CREATE TABLE table_15340 ("Client" CLOB, "Years of Operation" CLOB, "Area of Operation" CLOB, "Country" CLOB, "Services" CLOB)

What years was soc a client?
SELECT "Years of Operation" FROM table_15340 WHERE "Client" = 'soc'
SELECT "Years of Operation" FROM "table_15340" WHERE "Client" = 'soc'