This time, the query returned successfully, and the“DROP COLUMN”command shows a notice instead of throwing an error. How to Drop/Delete Multiple Columns From a Table in PostgreSQL? InPostgres, theDROP COLUMNcommand can be used with the comma-separated syntax to drop more than one column: A...
PostgreSQL DROP COLUMN:删除表中的一列或多列 -- ALTER TABLE 命令用于添加,修改,删除一张已经存在表的列-- 在一张已存在的表上 DROP COLUMN(删除列),语法如下-- 删除多列ALTERTABLEmovies."电视剧,纪录片"DROPCOLUMNf4,DROPCOLUMNf5,DROPCOLUMNf6;SELECT*FROMmovies."电视剧,纪录片" 参考链接 PostgreSQL ALTE...
前端使用vue+element-ui，我们经常会使用table来展示从后台请求回来的数据，但是，如果被请求回来数据是...
This tutorial shows you how to use the PostgreSQL DROP COLUMN clause in the ALTER TABLE statement to remove one or more columns of a table.
In PostgreSQL, the DROP and DROP IF EXISTS statements are used to delete any existing database object. We can drop a database, table, column, function, any ext…
PostgreSQL DROP INDEX example We will use theactortable from thesample databasefor the demonstration. The following statementcreates an indexfor thefirst_namecolumn of theactortable: CREATEINDEXidx_actor_first_nameONactor (first_name); Sometimes, the query optimizer does not use the index. For ex...
对于我拥有的模式和表名,我可以在单个查询中检查列是否与列表中的列名匹配,只需删除 假设要删除的列列表是 Drop_col = ['AB',' BC', FG', 'TR'] 但是我的TABLE1在列列表中只有'BC','TR‘ Query = ALTER TABLE SCHEMA_NAME.TABLE1 DROP COLUMN IN ({Drop}).format (Drop = Drop</em 浏览46提问...
2 changes: 1 addition & 1 deletion 2 apps/studio/src/lib/db/clients/postgresql.ts Original file line numberDiff line numberDiff line change @@ -407,7 +407,7 @@ export class PostgresClient extends BasicDatabaseClient<QueryResult> { async listTableIndexes(table: string, schema: string =...
删除表 DROP TABLE 清空表 TRUNCATE TABLE 修改列 ALTER TABLE CHANGE COLUMN 说明 仅支持修改列至更大的长度,不支持修改列的类型。添加列 ALTER TABLE ADD COLUMN 修改列的默认值 ALTER TABLE ALTER COLUMN SET DEFAULT 或 ALTER TABLE ... 截断分区(Truncate) 语法说明 TRUNCATE[PARTITION]name[CASCADE|RESTRIC...
DROPTABLEmy_table CASCADE;SELECTdependent_ns.nspnameasdependent_schema , dependent_view.relnameasdependent_view , source_ns.nspnameassource_schema , source_table.relnameassource_table , pg_attribute.attnameascolumn_nameFROMpg_dependJOINpg_rewriteONpg_depend.objid=pg_rewrite.oidJOINpg_classasdependent...