# `Table Selectors`
+ Table selector provides a match rule based on wildcard characters for schema and table
+ In `DM` task configuration, multiple features rely on table selector to provide the matching rules
  + For example: **`schema-pattern`** and **`table-pattern`**
+ Wildcard characters in table selector
  +  **`*`** matches zero or more characters
  +  **`*`** can only be used as a suffix, for example, `uni*` is supported, while `uni*se` is not supported
  +  **`?`** matches exactly one character except the empty character
+ Examples:
  + Matching all schemas and tables that have a `schema_` prefix in the schema name:
    + schema-pattern: "schema_*"
    + table-pattern: ""
  + Matching all tables that have a `schema_` prefix in the schema name and a `table_` prefix in the table name:
    + schema-pattern = "schema_*"
    + table-pattern = "table_*"
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