columns to rows in oracle

How to use transform to convert rows and columns; In Oracle, to convert rows and columns, DECODE and CASE statements are commonly used. For simple row and column conversion, DECODE and CASE statements can still cope with it. In scenarios where the

Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most

In the past decade,OracleIt has become one of the most professional databases in the world. For IT experts, IT is to ensure that their company's productivity is improved by leveraging the powerful features of Oracle. One of the most effective

In the development of the report, many times will encounter row and column conversion operations, the developer for the SQL level row and column conversion operation has been not very understanding, today just time to make some simple summary. Here

Oracle column self-increment-identity Columns in Oracle Database 12c Release 1 (12.1)In previous versions of Oracle 12C, if the column was to grow from a sequence + trigger, the new Identity columns feature was introduced into the 12C Oracle, which

Create a data groupAll group functions treat a table as a large group of information. However, it is sometimes necessary to divide this information table into smaller groups. You can accomplish this task by using the GROUP BY clause. Create a Data

Set and delete unavailable columns in Oracle. 1. What are unavailable columns? That is, one or more columns in the table are ALTERTABLEhellip; The SETUNUSED statement is set to program Set and delete unavailable columns in Oracle. 1. What are

Create a Data Group All group functions treat the table as a large information group. However, you sometimes need to divide the table into several smaller groups. You can use the group by clause to complete this task. Create a Data GROUP: group by

In the past decade, Oracle has become one of the world's most professional databases. For IT experts, it is to ensure that their company's productivity is improved by leveraging the powerful features of oracle. One of the most effective methods is

Oracle optimization (entry and improvement) In the past decade, Oracle has become one of the world's most professional databases. For IT experts, IT is to ensure that their company's productivity is improved by leveraging the powerful features of