你的位置:首页 > 数据库

[数据库]sql: postgreSQL sql script


SELECT * from pg_class c,pg_attribute a,pg_type t where c.relname='BookKindList' and a.attnum>0 and a.attrelid=c.oid and a.atttypid=t.oidSELECT a.attname from pg_class c,pg_attribute a,pg_type t where c.relname='BookKindList' and a.attnum>0 and a.attrelid=c.oid and a.atttypid=t.oid--查询BookKindList表的字段信息 20150402 Geovin Du 涂聚文SELECT a.attnum,a.attname AS field,t.typname AS type,a.attlen AS length,a.atttypmod AS lengthvar,a.attnotnull AS notnull from pg_class c,pg_attribute a,pg_type t where c.relname='BookKindList' and a.attnum>0 and a.attrelid=c.oid and a.atttypid=t.oidSELECT * FROM information_schema.columns; --查表的列表SELECT * FROM information_schema.columns where table_catalog='geovindu' and table_schema='public' and table_name='bookkindlist';--select * from pg_database where datname='bookkindlist';select datname,dattablespace from pg_database where datname='bookkindlist';--查看数据库select * from pg_database;--查看表空间select * from pg_tablespace; --查看语言select * from pg_language; --查看角色用户select * from pg_user;select * from pg_shadow;select * from pg_roles; --查看会话进程select * from pg_stat_activity; --查看表SELECT * FROM pg_tables where schemaname = 'public'; --查看表字段select * from information_schema.columns where table_schema = 'public' and table_name = 'bookkindlist'; --查看视图select * from pg_views where schemaname = 'public';select * from information_schema.views where table_schema = 'public'; --查看触发器select * from information_schema.triggers; --查看序列select * from information_schema.sequences where sequence_schema = 'public'; --查看约束select * from pg_constraint where contype = 'p' --u unique,p primary,f foreign,c check,t trigger,x exclusion select a.relname as table_name,b.conname as constraint_name,b.contype as constraint_type from pg_class a,pg_constraint b where a.oid = b.conrelid and a.relname = 'bookkindlist'; --查看索引select * from pg_index ; --查看表上存在哪些索引以及大小select relname,n.amname as index_type from pg_class m,pg_am n where m.relam = n.oid and m.oid in (select b.indexrelid from pg_class a,pg_index b where a.oid = b.indrelid and a.relname = 'bookkindlist'); SELECT c.relname,c2.relname, c2.relpages*8 as size_kbFROM pg_class c, pg_class c2, pg_index iWHERE c.relname = 'bookkindlist' ANDc.oid = i.indrelid ANDc2.oid = i.indexrelidORDER BY c2.relname; --查看索引定义select b.indexrelid from pg_class a,pg_index b where a.oid = b.indrelid and a.relname = 'bookkindlist';select pg_get_indexdef(b.indexrelid); --查看过程函数定义select oid,* from pg_proc where proname = 'insert_platform_action_exist'; --oid = 24610select * from pg_get_functiondef(24610); --查看表大小(不含索引等信息)select pg_relation_size('bookkindlist');             --368640 byteselect pg_size_pretty(pg_relation_size('bookkindlist'))  --360 kB --查看DB大小select pg_size_pretty(pg_database_size('geovindu'));  --12M --查看服务器DB运行状态[postgres@192.168.20.165 ~]$ pg_ctl status -D $PGDATApg_ctl: server is running (PID: 2373)/home/postgres/bin/postgres "-D" "/database/pgdata" --查看每个DB的使用情况(读,写,缓存,更新,事务等)select * from pg_stat_database --查看索引的使用情况select * from pg_stat_user_indexes; --查看表所对应的数据文件路径与大小SELECT pg_relation_filepath(oid), relpages FROM pg_class WHERE relname = 'bookkindlist'; --查看索引与相关字段及大小 SELECT n.nspname AS schema_name,    r.rolname as table_owner,    bc.relname AS table_name,    ic.relname AS index_name,    a.attname AS column_name,    bc.relpages*8 as index_size_kb    FROM pg_namespace n,    pg_class bc,       -- base class    pg_class ic,       -- index class    pg_index i,    pg_attribute a,      -- att in base    pg_roles r WHERE bc.relnamespace = n.oid   and i.indrelid = bc.oid   and i.indexrelid = ic.oid   and bc.relowner = r.oid   and i.indkey[0] = a.attnum   and i.indnatts = 1   and a.attrelid = bc.oid   and n.nspname = 'public'   and bc.relname = 'bookkindlist' ORDER BY schema_name, table_name, index_name, attname; --查看PG锁select * from pg_locks; 备注:relpages*8 是实际所占磁盘大小 --查看表空间大小select pg_tablespace_size('pg_default'); --查看序列与表的对应关系 WITH fq_objects AS (SELECT c.oid,c.relname AS fqname ,              c.relkind, c.relname AS relation          FROM pg_class c JOIN pg_namespace n ON n.oid = c.relnamespace ),   sequences AS (SELECT oid,fqname FROM fq_objects WHERE relkind = 'S'),   tables  AS (SELECT oid, fqname FROM fq_objects WHERE relkind = 'r' )     SELECT    s.fqname AS sequence,    '->' as depends,    t.fqname AS table   FROM    pg_depend d JOIN sequences s ON s.oid = d.objid         JOIN tables t ON t.oid = d.refobjid      WHERE    d.deptype = 'a' and t.fqname = 'bookkindlist';--select * from information_schema.columns where table_catalog= 'geovindu' AND table_name = 'bookkindlist';select * from pg_description; ---一个查询表结构的SQL SELECT  col.table_schema ,  col.table_name ,  col.ordinal_position,  col.column_name ,  col.data_type ,  col.character_maximum_length,  col.numeric_precision,  col.numeric_scale,  col.is_nullable,  col.column_default ,  des.descriptionFROM  information_schema.columns col LEFT JOIN pg_description des    ON col.table_name::regclass = des.objoid  AND col.ordinal_position = des.objsubidWHERE  table_schema = 'public'  AND table_name = 'bookkindlist'ORDER BY  ordinal_position;select * from pg_namespaceselect * from pg_class where relname='bookkindlist'---SELECTn.nspname ,relnameFROMpg_class c ,pg_namespace nWHEREc.relnamespace = n.oidAND nspname='public'AND relkind = 'r'AND relhassubclassORDER BYnspname ,relname;--select * from information_schema.columns where table_name = 'bookkindlist';--表结构select table_schema,table_name,column_name,data_type,column_default,character_maximum_length,is_nullable from information_schema.columns where table_name = 'bookkindlist';select table_schema,table_name,column_name as FieldName,data_type as  FieldType,column_default,character_maximum_length as  FieldLength,is_nullable from information_schema.columns where table_name = 'bookkindlist';--表主键名称select pg_constraint.conname as pk_name from pg_constraint inner join pg_class on pg_constraint.conrelid = pg_class.oid where pg_class.relname = 'bookkindlist' and pg_constraint.contype='p';--表主键字段select pg_constraint.conname as pk_name,pg_attribute.attname as column_name,pg_type.typname as data_type,pg_class.relname as table_name, info.character_maximum_length,info.is_nullable from pg_constraint inner join pg_class on pg_constraint.conrelid = pg_class.oid inner join pg_attribute on pg_attribute.attrelid = pg_class.oid and pg_attribute.attnum = pg_constraint.conkey[1]inner join pg_type on pg_type.oid = pg_attribute.atttypidinner join information_schema.columns as info on info.column_name=pg_attribute.attname where pg_class.relname = 'bookkindlist' and pg_constraint.contype='p';--表主键名称select conname,conrelid,connamespace from pg_constraint where contype='p';select * from pg_constraint where contype='p';---表和表主键名称select oid,relname from pg_class;select * from pg_class where relnamespace=2200;select * from pg_class;--表select * from pg_type where typnamespace=2200;select typnamespace,typname,oid from pg_type where typnamespace=2200;select * from pg_type where typname='bookkindlist';-- 主键字段名attnameselect * from pg_attribute;select * from pg_attribute where attstorage='p';select attrelid,attname,attnum from pg_attribute where attstorage='p';