这篇文章主要介绍了pg中replace和translate的用法说明(数据少的中文排序)，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧。
1.首先创建students表
CREATE TABLE students
(
id integer NOT NULL,
name character varying(255),
sex character varying(255),
class character varying(255),
"like" character varying(255),
school character varying(255),
phone character varying(255)
)
2.插入数据
INSERT INTO "public"."students" ("id", "name", "sex", "class", "like", "school", "phone")
VALUES ('1', '大猫', '女', '一年级', '绘画', '第三小学', '2345');
INSERT INTO "public"."students" ("id", "name", "sex", "class", "like", "school", "phone")
VALUES ('2', '小厌', '男', '三年级', '书法', '第四小学', '2346');
INSERT INTO "public"."students" ("id", "name", "sex", "class", "like", "school", "phone")
VALUES ('3', '库库', '女', '二年级', '绘画', '第三小学', '2342');
INSERT INTO "public"."students" ("id", "name", "sex", "class", "like", "school", "phone")
VALUES ('4', '艾琳', '女', '四年级', '书法，钢琴', '第四小学', '2349');
结果：
1select * from students
如下图：
3.replace 的用法
1replace(string text, from text, to text)
返回类型：text
解释：把字串string里出现地所有子字串from替换成子字串to
示例1：
1select replace('一条黑色的狗','黑','黑白相间')
结果：一条黑色的狗 变成了 一条黑白相间色的狗
如下图：
示例2：
1update students set name=replace(name,'大猫','小猫咪的姐姐')
结果：name为 ‘大猫'的这条数据name='小猫咪的姐姐'
