您可以命名特定对象以获取更多信息。使用+运算符还将列出表的约束和索引。postgres=# \d+ example_tbl Table "public.example_tbl"Column | Type | Collation | Nullable | Default | Storage | Compression | Stats target | Description---+---+---+---+---+---+---+---+---id | ...
GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA myschema TO myuser; 注意上面的命令, 如果schema下创建了新table, myuser并不能访问, 如果要新建的table也自动授权, 需要使用下面的语句 ALTER DEFAULT PRIVILEGES IN SCHEMA myschema GRANT SELECT ON TABLES TO myuser; -- 带增删改 ALTER DE...
locales-alllocales-all:i386Depends: postgresql-client-13postgresql-client-13:i386Depends: postgresql-commonDepends: ssl-certDepends: tzdata|Depends: debconfDepends: <debconf-2.0>cdebconfdebconfDepends: libc6Depends: libgcc1Depends: libgssapi-krb5-2Depends: libicu60Depends: libldap-2.4-2Depends: lib...
/sqlite3.c #define SQLITE_CORE 1 #define SQLITE_AMALGAMATION 1 #ifndef SQLITE_PRIVATE # define SQLITE_PRIVATE static #endif #define SQLITE_ENABLE_COLUMN_METADATA 1 //增加这句 ./configure --prefix=/usr/local/sqlite make -j 4 make install mv /usr/bin/sqlite3 /usr/bin/sqlite3_old ln -...
postgres=# \pset format html Output format is html. postgres=# \d tbase Table \"public.tbase" Column Type Modifiers id integer \ mc text \ 恢复为对齐模式 postgres=# \pset format aligned Output format
组合查询的主体还是采用数组方式查询,只是加入了一些特殊的查询支持,包括字符串模式查询(_string)、复合查询(_complex)、请求字符串查询(_query)数组条件可以和字符串条件(采用_string...(`status` = '1' OR `score` = '100') 复合查询相当于封装了一个新的查询..
pg_read_all_stats pg_stat_scan_tables pg_monitor PostgreSQL9.6只有一个系统角色: pg_signal_backend PostgreSQL 11 版本的psql中增加了命令\gdesc可以查看执行结果的数据类型:osdba=# select * from test01 \gdesc Column | Type ---+--- id | integer id2 | integer t | text (3 rows) PostgreSQL...
大表search IN ( consts ) 优化 场景: SaaS业务, 电商, 社交等场景 业务特点:IN的输入条件很多导致IN过滤慢 价值: 支持 linear search TO hash table probe,提高IN语句的处理性能, 在条件多、被过滤掉的数据量大的SQL中性能提升非常明显 DEMO: selectx from tbl where id in (1,2,3,4,5,6,7,8,9)...
Table "public.tbase" Column | Type | Modifiers ---+---+--- id | integer | mc | text | ●配置行列显示 postgres=# \x Expanded display is on. postgres=# select* from tbase where id=1; -[ RECORD 1 ] id | 1 mc | 1 -[ RECORD 2 ] id | 1 mc | 2 -[ RECORD 3 ]...
local all all trust # IPv4 local connections: host all all 127.0.0.1/32 trust # IPv6 local connections: host all all ::1/128 trust # Allow replication connections from localhost, by a user with the # replication privilege. local replication all trust ...