General \copyright show PostgreSQL usage and distribution terms \crosstabview [COLUMNS] execute query and display result in crosstab \errverbose show most recent error message at maximum verbosity \g [(OPTIONS)] [FILE] execute query (and send result to file or |pipe); \g with...
UPDATE, or DELETE operation, either once per modified row, or once per SQL statement.UPDATE triggers can moreover be set to fire only if certain columns are mentioned in the SET clause of the UPDATE statement.Triggers can also fire for TRUNCATE statements.If a trigger event occurs, the tri...
{ "raise_exception", ERRCODE_RAISE_EXCEPTION }, { "no_data_found", ERRCODE_NO_DATA_FOUND }, { "too_many_rows", ERRCODE_TOO_MANY_ROWS }, { "assert_failure", ERRCODE_ASSERT_FAILURE }, { "internal_error", ERRCODE_INTERNAL_ERROR }, { "data_corrupted", ERRCODE_DATA_CORRUPTED }, { ...
Curly|ok (2rows) SELECT*FROMpersonWHEREcurrent_mood>'sad'ORDERBYcurrent_mood; name|current_mood ---+--- Curly|ok Moe|happy (2rows) SELECTname FROMperson WHEREcurrent_mood=(SELECTMIN(current_mood)FROMperson); name --- Larry (1row) 地理位置类型 网络地址类型 inet 和 cidr 的区别 二者最关...
\crosstabview [COLUMNS] execute query and display results in crosstab \errverbose show most recent error message at maximum verbosity \g [(OPTIONS)] [FILE] execute query (and send results to file or |pipe); \g with no arguments is equivalent to a semicolon ...
(4 rows) postgres=# show search_path; #查看当前schema信息 search_path --- "$user", public #$user意为和当前用户名同名的scheam,先从该schema中操作表,如果找不到则会从public查找并操作 (1 row) [postgres@VM-4-10-centos ~]$ psql -d postgres -h 10.0.4.10 -p 1921 -U miaosha #切换miao...
所有需要逻辑复制的表需要具有主键或复制标识符,可查询select relname ,relreplident from pg_catalog.pg_class ;(relreplident的取值及含义为Columns used to form “replica identity” for rows: d = default (primary key, if any), n = nothing, f = all columns, i = index with indisreplident set...
pgbench=# SELECT * from vvv where aid='47';aid | bid | abalance | filler---+---+---+---(0 rows)pgbench=# SELECT * from vvv where aid='48';aid | bid | abalance | filler---+---+---+---48 | 1 | 888888 |(1 row) OK,自动刷新物化视图是成功的 五, 物化视图的修改 更...
个人曾经在不同机器配置以及不同的Windows系统当中个人尝试多次安装Postgresql,发现每一次情况都不一样,强烈建议读者使用虚拟机的Linux系统安装Postgresql...
Summary: in this tutorial, you will learn how to use the PostgreSQL ADD COLUMN statement to add one or more columns to an existing table. Introduction to the PostgreSQL ADD COLUMN statement To add a new column to an existing table, you use the ALTER TABLE ADD COLUMN statement as follows:...