The maximum number of all NDB database objects in a single NDB Cluster—including databases, tables, and indexes—is limited to 20320. To determine the sizes of all of your databases, at the mysql> prompt type the following command: SELECT table_schema AS "Database", ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS "Size (MB)" FROM information_schema.TABLES GROUP BY table_schema; The maximum number of attributes (that is, columns and indexes) that can belong to a given table is 512. ; Second, apply the LENGTH function to return the number of characters of the full name of each employee. Like most relational databases, MySQL provides useful metadata about the database itself. The following MySQL statement returns the pub_name and length of pub_name from publisher table who have the length of there is more than or equal to 20. Code: SELECT pub_name,LENGTH(pub_name) FROM publisher WHERE LENGTH(pub_name)>=20; Sample table: publisher I've been working with databases for a couple of decades; I only hit limits on table name length regularly when working with [full-blown] Oracle (how they can still justify only 30 characters for a table name, I'll never know). include/mysql_com.h:#define NAME_LEN 64 /* Field/table name length */ I also see a couple places where characters are added to the end for buffers to handle file extensions. USE mysql; SHOW CREATE TABLE innodb_index_stats ; Check, in particular, the definition of table_name. It used to be `table_name` varchar(64) COLLATE utf8_bin NOT NULL, 8.0 changes it to `table_name` varchar(199) COLLATE utf8_bin NOT NULL, If it is still 64, simulate what mysql… 64 characters for a table name is quite a lot unless you're writing a small novel in each table name. How the query works. Example of MySQL LENGTH() function with where clause . Have you tried tables of 60, 61 and 63 characters. Number of database objects. mysql> CREATE TABLE pet (name VARCHAR(20), owner VARCHAR(20), species VARCHAR(20), sex CHAR(1), birth DATE, death DATE); VARCHAR is a good choice for the name , owner , and species columns because the column values vary in length. ; Third, sort the result set by the result of the LENGTH function and get five rows from the sorted result set. This section describes the permissible syntax for identifiers in MySQL. When you type the correct password, the mysql> prompt appears. First, use the CONCAT function to construct the full name of the employee by concatenating the first name, space, and last name. Certain objects within MySQL, including database, table, index, column, alias, view, stored procedure, partition, tablespace, resource group and other object names are known as identifiers. I took a glance at the source code and table name lengths do appear to be set at 64 characters. 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