Oracle SQL Tutorial
Oracle SQL is the SQL language for the relational database Oracle. SQL is the abbreviation of Structured Query Language, which is used to perform operations such as additions, deletions, modifications, and queries on relational databases. Oracle SQL includes a large number of SQL statements that can be used to retrieve data from tables, insert and update data, and delete data. In this article, we will cover the basics and advanced features of Oracle SQL.
1. Introduction to Oracle SQL
Oracle SQL is the query language of the Oracle database system. Oracle SQL provides a simple way to query, update, and manage data in Oracle Database. The Oracle SQL language is an extended version of the ANSI/ISO SQL standard.
2. Oracle SQL basic statements
Among them, column1, column2, … column_n is the name of the column to be retrieved, and table_name is the name to be retrieved The name of the data table.
where table_name is the table into which data is to be inserted. The name of column1, column2, … column_n is the name of the column into which data is to be inserted, and value1, value2, … value_n is the value to be inserted.
Where, table_name is the name of the data table to be updated, column1 , column2, … column_n are the names of the columns to be updated, value1, value2, … value_n are the values to be updated, and condition is the update condition.
where table_name is the name of the table to delete data, and condition is the deletion condition.
3. Oracle SQL advanced features
Where, table1 and table2 are the names of the tables to be connected.
Where column_names is the name of the column to be retrieved, table_name is the name of the column to be retrieved The name of the data table, column_name is the name of the column to be retrieved.
where column_name1 is the name of the column to be grouped, and column_name2 is the column to be summarized The name.
where procedure_name is the name of the stored procedure.
4. Summary
Oracle SQL is a powerful query language used in the Oracle database system. It has extensive functionality and advanced features, including JOINs, subqueries, grouping and aggregation, and stored procedures. Understanding these capabilities will enable you to work with data in Oracle Database more efficiently.
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