IF EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema='ent' AND table_name='AdsPlatform' AND column_name='Name') THEN UPDATE ent."AdsPlatform" SET "PlatfromSettlementParty"="Name" WHERE "PlatfromSettlementParty" is null; ELSE UPDATE ent."AdsPlatform" SET "PlatfromSettlementPar...
postgresql change table --if cloumn existSELECTEXISTS(SELECT1FROMinformation_schema.columnsWHEREtable_schema='ent'ANDtable_name='AdsPlatform'ANDcolumn_name='Name');--add cloumnALTERTABLEfinance."MappingInfo"ADDCOLUMNIFNOTEXISTS"Active"boolean;UPDATEfinance."MappingInfo"SET"Active"=falsewhere"Active"is...
PostgreSQL has rename table statement which is used with rename clause to change the name of an existing table. Syntax: ALTER TABE table_name RENAME to new_table_name; In the above statement, first you specify the existing table name which you want to rename and secondly, specify new table ...
\d tblname 查看表结构 \di 查看索引 create database [数据库名] 创建数据库 drop database [数据库名] 删除数据库 alter table [表名A] rename to [表名B] 重命名一个表 drop table [表名] 删除一个表 alter table [表名] add column [字段名] [类型] 在已有的表里添加字段 alter table [表名...
它先通过alter table t2 drop fk1,add _fk1重建外键参考,指向新表 再rename t1 t1_old, _t1_new t1,交换表名,不影响客户端 删除旧表 t1_old 但如果字表t2太大,以致alter操作可能耗时过长,有可能会强制选择 drop_swap。 涉及的主要方法在 pt-online-schema-change 文件的determine_alter_fk_method,rebuild...
在PostgreSQL中,如果需要重命名和更改列数据类型,我会运行两个单独的查询来完成此操作。要重命名:并更改列类型:ALTER TABLE tblName CHANGE COLUMN < 浏览2提问于2014-08-20得票数56 回答已采纳 1回答 PostgreSQL:数据类型Double的默认值设置错误 、、、 ...
| SLOT NAME = slot_name 修改订阅 Command: ALTER SUBSCRIPTION Description: change the definition of a subscription Syntax: ALTER SUBSCRIPTION name WITH ( option [, ... ] ) ] where option can be: SLOT NAME = slot_name ALTER SUBSCRIPTION name OWNER TO { new_owner | CURRENT_USER...
INSERT INTO TABLE_NAME (column1, column2, column3,...columnN)VALUES (value1, value2, value3,...valueN); 例:insert into postgtest (title,content) values('title1','content1'); 执行结果INSERT 0 1 ( INSERT 0 # 插入多行返回的信息, # 为插入的行数。)检索 ...
To change or modify the table’s owner in PostgreSQL, use the “ALTER TABLE tab_name OWNER TO new_owner_name;” command. To alter the table’s owner, the user must be a superuser, or he must have the “ALTER TABLE” permissions. In PostgreSQL, the “\dt” command can be used to...
#autovacuum_vacuum_scale_factor = 0.2 # fraction of table size before vacuum #autovacuum_analyze_scale_factor = 0.1 # fraction of table size before analyze #autovacuum_freeze_max_age = 200000000 # maximum XID age before forced vacuum # (change requires restart) ...