FIND_IN_SET(): list是常量,则可以直接用IN, 否则要用find_in_set()函数。 也就是这两个sql是查询的效果是相同的: SELECT id,name,list from tb_test WHERE FIND_IN_SET('daodao',list); SELECT * from C_PURCHASINGMASTERDATA where FIND_IN_SET(EKGRP,'C54,C02,C14,C60,C06,C61,C53,C51,C12,C...
PostgreSQL: to_date(a.tag_create_date,‘yyyy-mm-dd HH:MM:SS’) (2) IFNULL()函数 MySQL: IFNULL(a.idm,‘’) PostgreSQL: COALESCE(a.id,‘’) (3) sysdate()函数 MySQL: SELECT sysdate() PostgreSQL: SELECT now() (4) find_in_set()函数(允许在逗号分隔的字符串列表中查找指定字符串的位...
` in i` `ActiveRecord` `findAllByAtributes`中同时存在`AND`和`OR`条件 、 我有一个控制器函数,它根据一些列名(created_user_id、status_id、company_id )准备一个条件。记录是从表jobs中获取的,如果满足某些条件,我们必须使用特定的job_id获取更多的行。示例如下所示。(created_user_id = 123 AND status...
Thus a containment query looking for this structure would result in an extremely specific index search; but there is no way at all to find out whether foo appears as a key. On the other hand, a jsonb_ops index would create three index items representing foo, bar, and baz separately; ...
for p in upstream_pipes: if p in interesting_pipes: return Nil else interesting_pipes.append(p) find_all_pipes_upstream(upstream_node(p)) 我已经在纯SQL中编写了以下函数: upstream_pipes(node_name varchar) RETURNS SETOF "Pipes" upstream_node(pipe_name varchar) RETURNS "Node" ...
3Find all solutionsData analysis PostgreSQL 中的 DELETE 查询 – 它用于从表中删除行数据,WHERE 子句条件在 DELETE 查询中是可选的。 语法: DELETE FROM table_name WHERE condition; 示例: DELETE FROM GFG WHERE order_no = 4; 输出: DELETE 1 Query returned successfully in 61 msec. ...
You must specify the --config-file or -D invocation option or set the PGDATA environment variable. 没有指定配置文件,赶紧看看配置文件再哪里? find / -name "postgresql.conf" /var/pgsql/data/postgresql.conf 哦,原来初始化数据库的时候就建立了配置文件,赶紧写上: ./postmaster --config-file=/var...
3Find all solutionsData analysis 在PostgreSQL中删除查询– 它用于从表中删除行数据,WHERE子句条件在DELETE查询中是可选的。 语法: DELETE FROM table_name WHERE condition; 范例: DELETE FROM GFG WHERE order_no = 4; 输出: DELETE 1 Query returned successfully in 61 msec. ...
/bin/bash . /home/nagios/.bash_profile # FILE需和 postgresql crontab里面输出的文件一致 # ALIVE_MINUTES=20 表示20分钟内$FILE被修改过, 心跳存在. 否则心跳停止(告警). FILE=/tmp/sync_digoal.log ALIVE_MINUTES=20 ALIVE_CNT=0 # 文件是否存在 if [ -f $FILE ]; then ALIVE_CNT=`find $FILE ...
string.size() string.substr(start, length) string.find_first_of(string, start_offs) string::npos 这里解释一下前面如果find-first-of没有找到的话 会返回一个-1 ,但是npos是个无符号数 所以等同于最大长度 void inline TokenizeSmart(const string& str, vector<string>& tokens) { // This is esse...