oracle lowercase column name

After the project was ported from Oracle to PostgreSQL (version 9.4), the days went down again, tracked and positioned to determine that the call to the Pgdatabasemetadata.getprimarykeys () interface returned an empty set.It is well known that in

Bulk change the table name to uppercase begin   for C in (select table_name TN from USER_TABLES where TABLE_NAME <> UPPER (table_name)) Lo op       begin          EXECUTE immediate ' ALTER TABLE ' | | c.tn| | ' Rename to ' | | c.tn;       exception 

Created: Article attributes: original Article submission: T_Torchidy (jnchaha_at_163.com) Oracle web Environment Injection Technology## BY Jianxin# Http://www.loveshell.net/# Preface I am not a professional database administrator, nor a researcher

Databases and instances=============================================Jdbc:oracle:thin:@127.0.0.1:1521:orclListening:Start monitoring: Lsnrctl startStop listening: Lsnrctl stop ORCLView listening status: Lsnrctl statusNET Start OracleservicenameNET

From: http://woainichenxueming.iteye.com/blog/726541I. Optimizing SQL statements in Oracle to improve operational efficiency1. Select the most efficient table name order (valid only in the rule-based optimizer)The Oracle parser processes the table

Reproduced from: https://wenku.baidu.com/view/cfa4e185fd0a79563c1e72a0.html 1. Oracle differs from SQL Server 2005. On the macro level:1. The biggest difference is that the platform, Oracle can run on different platforms, SQL Server can only run on

V. Index Optimization Design 1. Manage organization Indexes The index can greatly accelerate the database query speed. The index maps the logical value in the table to a safe RowID, so the index can quickly locate the physical address of the data.

Functions in oracle are divided into character functions, number functions, date functions, empty processing functions, conversion functions, and other common functions. The following are some SQL functions commonly used in ORACLE: lower () function

The original developer at the data abstraction layer of a new PHP Data Object (PDO) briefly introduces this abstraction layer, focusing on running with Oracle. PHP: 5.0 requiredOther required: Oracle 8 or later client libraryDownload PDO for Oracle (

SQL optimization should be adjusted from five aspects:1. Remove unnecessary full table scans for large tables2. cache full table scan for small tables3. Verify the use of optimized Indexes4. Verify the optimized Connection Technology5. minimize the