PostgreSQL的备份工具可以使用pg_dump及pg_dumpall。可以通过pg_dump --help获取其使用方法。这里不对其做过多介绍。主要介绍在使用pg_dump及恢复过程中遇到的一个问题。 1、问题 使用pg_dump -c导出后,通过psql导入时报下面的错误: 代码语言:javascript 代码运行次数:0 ERROR:relation"t1"already existsERROR:duplic...
简介:PG备份恢复:multiple primary keys for table "t1" are not allowed 数据库导入导出是最常用的功能之一。PostgreSQL的备份工具可以使用pg_dump及pg_dumpall。可以通过pg_dump --help获取其使用方法。这里不对其做过多介绍。主要介绍在使用pg_dump及恢复过程中遇到的一个问题。 1、问题 使用pg_dump -c导出后...
PostgreSQL can use multiple fields as Primary Key (doc) but how to handle that with Exposed DAO ? I tried to use the DAO with a table which is quite complexe. Because example is better than words. Here the SQL : CREATE TABLE table__contacts_first ( contact_id UUID NOT NULL, app_id...
Beginner Database Administrator Developer Azure Database for PostgreSQL This module introduces SQL joins, which are essential for combining data from multiple tables. You learn about INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN, and NATURAL JOIN....
DATABASES = { 'default': { 'NAME': 'app_data', 'ENGINE': 'django.db.backends.postgresql', 'USER': 'postgres_user', 'PASSWORD': 's3krit' }, 'users': { 'NAME': 'user_data', 'ENGINE': 'django.db.backends.mysql', 'USER': 'mysql_user', 'PASSWORD': 'priv4te' } } If the...
opensearch-primary-node-fault-tolerância opensearch-update-check rabbit-mq-supported-version rds-aurora-mysql-audit-ativado para registro rds-aurora-postgresql-logspara cloudwatch rds-automatic-minor-version-habilitado para atualização rds-cluster-auto-minor-version-upgrade-enable rds-cluster-default-...
opensearch-primary-node-fault-tolerância opensearch-update-check rabbit-mq-supported-version rds-aurora-mysql-audit-ativado para registro rds-aurora-postgresql-logspara cloudwatch rds-automatic-minor-version-habilitado para atualização rds-cluster-auto-minor-version-upgrade-enable ...
I think we should have a very quick device to indicate this for tables, etc. and it would just have to be all over the docs: Table('t',metadata,Column('id',Integer,primary_key=True),Column("data",String(50)),insert_sentinel() ) ...
gitlab_shared All application tables that contain data across all decomposed databases (for example, loose_foreign_keys_deleted_records) for models that inherit from Gitlab::Database::SharedModel. gitlab_internal All internal tables of Rails and PostgreSQL (for example, ar_internal_metadata, schema...
I have populated this table with random data for i and j having both of them having 1000 of distinct values, independent on each other. I also created couple of other tables with same data just with really low cardinality with i and j having just 3 values each. The table contained about...