How to count number of columns in Oracle 10g?

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How to count number of columns in Oracle 10g?

I use oracle 10g and I want to develop a J2EE application to count the number of columns of different tables. SELECT table_name, count (*) FROM user_tab_columns WHERE table_name = ‘…’;

How does the count ( ) function in Oracle work?

For example, the following statement returns the contacts’ last names that appear more than one: Firstly, the GROUP BY clause divides the rows in the contacts table into groups based on the values in the last_name column. Secondly, the COUNT () function returns the number of the same last names for each last name.

How to find the frequency of each element in a column?

SQL Query to find out the frequency of each element in a column This blog explain how we can get the frequency distribution of each element in a column using SQL. This blog explain how we can get the frequency distribution of each element in a column using SQL.

How to convert rows to columns in Oracle Database 11g?

Let’s begin! Oracle Database 11g introduced the pivot operator. This makes switching rows to columns easy. To use this you need three things: The value in the new columns must be an aggregate. For example, count, sum, min, etc. Place a pivot clause containing these items after the table name, like so:

SQL Query to find out the frequency of each element in a column This blog explain how we can get the frequency distribution of each element in a column using SQL. This blog explain how we can get the frequency distribution of each element in a column using SQL.

How to count columns in a table using SQL?

select count(*) from user_tab_columns where table_name=’MYTABLE’ –use upper case. Instead of uppercase you can use lower function. Ex: select count(*) from user_tab_columns where lower(table_name)=’table_name’;

Let’s begin! Oracle Database 11g introduced the pivot operator. This makes switching rows to columns easy. To use this you need three things: The value in the new columns must be an aggregate. For example, count, sum, min, etc. Place a pivot clause containing these items after the table name, like so:

How to find number of columns in Oracle Database?

(A) basic statistics of number of columns in all tables accessible to the current user in Oracle database (B) basic statistics of number of columns in all tables in Oracle database Query was executed under the Oracle9i Database version. B. If you have privilege on dba_tables and dba_tab_columns