postgresql常用的sql语句分享
这篇文章主要介绍“postgresql常用的sql语句分享”,在日常操作中,相信很多人在postgresql常用的sql语句分享问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”postgresql常用的sql语句分享”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
sql语句
15个常用的语句:1.select relname,relpages from pg_class order by relpages desc2.selecr pg_database_size('数据库名')3.select pg_size_pretty(pg_total_relation_size('表名‘))4.\d 表名5.create index name on table using index_type(colum)6.rollback,commit7.explain query 8.explain analyze query9.insert into number(num) values (generate_series(1,1000))10.select count(*) from table ,select count(col_name) from table,select count(distinct 列名) from table11.slect MAX(num) from number_table where num < (select MAX(num) from number_table)12.select MIN(col_name) from number_table where num >(select MIN(num) from number_table)13.select typname,typlen from pg_type where typtype = 'b'14.\g output_file,select * from table_name,\g15.加密:select crypt('sathiys',gen_salt('md5'));16.insert into WU(a1,b1) select generate_series(1,1000000),'aa';17.select name,setting,short_desc from pg_settings where name like '%scan';
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