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Select all data types that are present in SQL (in most of RDBMS).
Following data types are present in most of the following RDBMS:
CHAR (fixed length string),
VARCHAR (variable length string),
Actually there are much more data types (like SMALLINT, DOUBLE, FLOAT, TIMESTAMP) - but they may be called differently in different RDBMS, so they are purposely not mentioned in this question.
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