达梦数据库使用案例实践

1.从开始截取到第一个括号处的字符串

WITH temp AS (
	SELECT '体育西路(558路)' AS route_name
)
SELECT SUBSTR(r.route_name, 0, LOCATE('(' , r.route_name)-1) AS line_name FROM temp r

参考:LOCATE函数简介