CREATE TABLE table_19137 ("School" CLOB, "Mascot" CLOB, "Conference" CLOB, "National Titles" FLOAT, "Founded" FLOAT)

how many overall championships does concordia university have
SELECT MIN("National Titles") FROM table_19137 WHERE "School" = 'Concordia University'
SELECT MIN("National Titles") FROM "table_19137" WHERE "School" = 'Concordia University'