Database

Case-(in)sensitive, collation and quote in different DBMSs.

April 21, 2023
Database

Case-(in)sensitive, collation and quote in different DBMSs.

In Oracle Database, you can use double quotes (") to quote SQL identifiers such as table names, column names, and aliases. By enclosing an identifier in double quotes, you can use mixed case, special characters, or reserved words as identifiers.

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Oracle Usage FAQ

April 21, 2023
Database

Unlike other databases like MySQL, PostgreSQL, etc., Oracle database have some dialect and different concepts, for example, create database command won’t work in Oracle, instead, it uses user as the isolate mechanisim instead of database.

Here Oracle Database basic usages FAQs record:

  • Oracle create user/database via sqlplus
  • Oracle JDBC driver oci8 vs. thin?
  • Oracle sqlplus show non-system users
  • Oracle sqlplus show tables and views
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Connecting Clickhouse to pupular OLTP DBMSs

April 20, 2023
Database

How to Connect Clickhouse to PostgreSQL, MySQL, Oracle, SQL-Server, MongoDB.

This post shows a step-by-step tutorial for connecting ClickHouse to PostgreSQL, MySQL and MongoDB via the ClickHouse storage engine and connecting Oracle and SQL-Server via the JDBC-bridge(the official JDBC-bridge has some limitations, check this fork as a workaround)

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