INFORMATION_SCHEMA. TABLES returns one row for each table in the current database for which the current user has permissions. As of SQL Server 2008, you can also use sys. tables to count the the number of tables.
How many tables are there in SQL Server?
You can create up to 2,147,483,647 tables in a database, with up to 1024 columns in each table.
How do I count all tables in a database?
Get record count for all tables in MySQL database?
- SELECT SUM(TABLE_ROWS) FROM INFORMATION_SCHEMA. TABLES WHERE TABLE_SCHEMA = ‘yourDatabaseName’; …
- mysql> SELECT SUM(TABLE_ROWS) ->FROM INFORMATION_SCHEMA. TABLES ->WHERE TABLE_SCHEMA = ‘business’; …
- mysql> SELECT table_name, table_rows ->FROM INFORMATION_SCHEMA.
How do I get a list of all tables in SQL Server?
Then issue one of the following SQL statement:
- Show all tables owned by the current user: SELECT table_name FROM user_tables;
- Show all tables in the current database: SELECT table_name FROM dba_tables;
- Show all tables that are accessible by the current user:
How do I count multiple tables in SQL?
To achieve this for multiple tables, use the UNION ALL. select sum(variableName. aliasName) from ( select count(*) as yourAliasName from yourTableName1 UNION ALL select count(*) as yourAliasName from yourTableName2 ) yourVariableName; Let us implement the above syntax.
How do I count the number of rows in a SQL table?
The SQL COUNT() function returns the number of rows in a table satisfying the criteria specified in the WHERE clause. It sets the number of rows or non NULL column values. COUNT() returns 0 if there were no matching rows. The above syntax is the general SQL 2003 ANSI standard syntax.
How do I count rows in SQL?
To counts all of the rows in a table, whether they contain NULL values or not, use COUNT(*). That form of the COUNT() function basically returns the number of rows in a result set returned by a SELECT statement.
How do I list all columns in a table in SQL?
Lets assume our table name is “Student”.
- USE MyDB.
- SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = N’Student’
- EXEC sp_help ‘Student’
- select * from sys.all_columns where object_id = OBJECT_ID(‘Student’)
How do I view all tables in SQL Plus?
The easiest way to see all tables in the database is to query the all_tables view: SELECT owner, table_name FROM all_tables; This will show the owner (the user) and the name of the table.
How can I see all tables in MySQL database?
To get a list of the tables in a MySQL database, use the mysql client tool to connect to the MySQL server and run the SHOW TABLES command. The optional FULL modifier will show the table type as a second output column.
How do I count the number of rows in multiple tables?
You need to do the following:
- Use SELECT COUNT (*) on each table to have its rowed total.
- Use UNION ALL to build a result of the row count of each table.
- Wrap that result set in CTE or derived table.
- Select from the CTE or derived table SUMing the row count column.
How do you count the number of tables in a schema?
To check the count of tables. mysql> SELECT count(*) AS TOTALNUMBEROFTABLES -> FROM INFORMATION_SCHEMA. TABLES -> WHERE TABLE_SCHEMA = ‘business’; The following output gives the count of all the tables.
How do I count unique values in SQL?
The COUNT DISTINCT function returns the number of unique values in the column or expression, as the following example shows. SELECT COUNT (DISTINCT item_num) FROM items; If the COUNT DISTINCT function encounters NULL values, it ignores them unless every value in the specified column is NULL.