Whatsapp允许您通过以下方式链接到新消息
<a href="whatsapp://send?text=The text to share!" data-action="share/whatsapp/share" class="Share-link m-whatsapp">
这样如何将用户从网站跳转到微信小程序
package java_learning;
public class main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("what is your name?");
String name = scanner.nextLine();
System.out.println("hello"+na
我有一个类似于users表的
CREATE TABLE users (
id bigserial NOT NULL,
msisdn text NOT NULL
);
以及定义在UNIQUE上的msisdn约束:
ALTER TABLE users ADD CONSTRAINT UNIQUE (msisdn);
现在,我试着跑
EXPLAIN SELECT * FROM users WHERE msisdn = '000000000001';
PostgreSQL回来了
Seq Scan on users (cost=0.00..7.80 rows=1 width=40
我的代码在这里,我使用'@>‘与gin索引进行搜索,但postgresql使用Seq扫描。
DROP TABLE IF EXISTS sponsor_projects;
CREATE TABLE sponsor_projects (
project_id BIGSERIAL PRIMARY KEY,
sponsor_id bigint NOT NULL,
status smallint NOT NULL DEFAULT 0,
name character varying(64) NOT NULL,
category character v