Recent questions tagged database

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database - Effective strategy for leaving an audit trail/change history for DB applications?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 928 views

database - Difference between NOW(), SYSDATE() & CURRENT_DATE() in MySQL

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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database - Difference between a statement and a query in SQL

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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database - Map items of collection snapshot in Firebase Firestore

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 870 views

database - Row count of a column family in Cassandra

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 862 views

database connection - PostgreSQL: Warning: Console code page (437) differs from Windows code page (1252)

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.0k views

database - Conditional INSERT INTO statement in postgres

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 924 views

database - Adding a column as a foreign key gives ERROR column referenced in foreign key constraint does not exist

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 703 views

database - Evaluating HDF5: What limitations/features does HDF5 provide for modelling data?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 780 views

database - SQL for Opening Hours

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 808 views

database - Primary Key versus Unique Constraint?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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database - PGError: ERROR: permission denied for relation (when using Heroku)

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 741 views

database - How do I remove keys?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 808 views

database - One-to many relationships in ER diagram

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 858 views

database - Atomic operations in Django?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.4k views

database - How to tag a changeset in liquibase to rollback

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 737 views

database design - Sql Data Type for Primary Key - SQL Server?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 839 views

database - What is the biggest ID number that autoincrement can produce in mysql

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 841 views

database - How to remove foreign key constraint in sql server?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 843 views

database - In a join table, what's the best workaround for Rails' absence of a composite key?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.2k views

database design - What tag schema(s) are the most efficient/effective?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 866 views

database - Hibernate @OneToMany remove child from list when updating parent

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 740 views

database - How can I add comments in MySQL?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 689 views

database design - How to understand the 5th Normal Form?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 987 views

database - MySQL enum vs. set

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 961 views

database design - What is the difference between 3NF and BCNF?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 818 views

database design - SQL Server: how to constrain a table to contain a single row?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 672 views

database design - Anatomy of a Distributed System in PHP

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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