client_addr,age(clock_timestamp(), query_start),query from pg_stat_activity where pid<>pg_backend_pid() and state=\'active\' order by query_start desc;'-- all_reslove_session\setsession'select pid,usename,datname,application_name,client_addr,age(clock_timestamp(), query_start),query f...
DB=# help--总的帮助DB=# \h--SQL commands级的帮助DB=# \?--psql commands级的帮助 按列显示,类似MySQL的\G DB=# \x Expanded displayison. 查看DB安装目录(最好root用户执行) find/-name initdb 查看DB版本 cat $PGDATA/PG_VERSION psql--versionDB=# show server_version; DB=#selectversion(); ...
variables show help on special variables \h [NAME] help on syntax of SQL commands, * for all commandsQuery Buffer \e [FILE] [LINE] edit the query buffer (or file) with external editor \ef [FUNCNAME [LINE]] edit function definition with external editor...Informational (o...
[commands] 显示反斜杠命令的帮助 \? options 显示在psql命令行选项的帮助 \? variables 显示某个变量的帮助 \h [NAME] SQL 命令语法上的说明,用 * 显示全部命令Query Buffer \e [FILE] [LINE] edit the query buffer (or file) with external editor \ef [FUNCNAME [LINE]] edit function definition wit...
-e, --echo show the commands being sent to the server -q, --quiet don't write any messages -t, --table=TABLE cluster specific table(s) only -v, --verbose write a lot of output -V, --version output version information, then exit ...
\h [NAME] help on syntax of SQL commands, * for all commands Query Buffer \e [FILE] [LINE] edit the query buffer (or file) with external editor \ef [FUNCNAME [LINE]] edit function definition with external editor ... Informational ...
explain [options] sql语句 例如 explain select * from test; explain (format xml) select * from test; explain (analyze true,buffers true) select * from test; 1. 2. 3. 4. 5. 6. options可选项如下: ANALYZE(默认FALSE):实际执行sql,显示真实的执行计划及返回行数 ...
PL/pgSQL function tg_t_ret() during function exit LOCATION: convert_tuples_by_position, tupconvert.c:137 【小结1】 INSERT 触发器: for TABLE 1. before for each statement (触发器函数的返回值无意义) 2. before for each row (第一个被触发的触发器, 触发器函数的NEW值取自SQL语句) 返回值的...
# select 'could we still work'; ERROR: current transaction is aborted, commands ignored until end of transaction block postgres=!# 为什么要使用子查询,这个问题在上面的事务工作的情况下,一目了然因为在整个事务的设计中,很可能会报错,但是我将事务设计是按照一个连贯的逻辑来设计的,也就是即使出现了错误...