Example (MySQL):

CREATE TABLE ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
(
   ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo int
);

In MySQL, the identifier must not exceed 64 characters.

Consider the following limitations for different databases:

• Sybase ASE:

  • 253 for quoted names
  • 255 for unquoted names

• Db2 LUW:

  • 18 for BUFFER POOL, INDEX EXTENSION, TABLESPACE, TRANSFORM, and TYPE MAPPING
  • 128 for other objects
• Db2 iSeries: 128

• Db2 z/OS:

  • 8 for DATABASE and TABLESPACE
  • 30 for columns and cursors with WITH RETURN
  • 128 for other objects
• Derby: 128
• Exasol: 128
• HSQLDB: 128

• MySQL:

  • 256 for aliases in queries
  • 32 for USER and ROLE
  • 64 for other objects

• MariaDB:

  • 80 for USER
  • 128 for ROLE
  • Other objects as in MySQL
• Microsoft SQL Server: 128
• Vertica: 128
• SQL 92: 128
• Snowflake: 255
• Redshift: 127
• PostgreSQL/Greenplum/Cockroach: 63

• Oracle:

  • Long names are enabled (database.oracle.names.long is specified, Oracle version is earlier than 12.2 or is unknown):

    • 30 for DISKGROUP, ROLLBACK SEGMENT, TABLESPACE, and PLUGGABLE DATABASE
    • 8 for DATABASE
    • 128 for other objects
  • Long names are disabled:
    • 8 for DATABASE
    • 128 for DATABASE LINK
    • 30 for other objects