Support data check for source databases such as GaussDB(DWS), MySQL, and PostgreSQL, with the destination database being GaussDB(DWS).
Check common fields, such as numeric, time, and character types.
Support three check levels, including high, middle, and low.
Check schemas, table names, and column names.
Specify the check scope of records. By default, all records are checked.
Support various check methods, including COUNT(*), MAX, MIN, SUM, AVG, and sampling details check.
Output the check result and related check details.

**Table 1** Data check levels
Check Level	Description	Syntax
No	-	-
Low	Quantity check	Number of records: *COUNT()**
Middle	Quantity check Numeric type check	Number of records: *COUNT() Value check: MAX, MIN, SUM, and AVG**
High	Quantity check Numeric type check Date type check Character type check	Number of records: *COUNT() Value check: MAX, MIN, SUM, and AVG Date check: MAX, MIN Character check: order by limit 1000**, which reads the data and checks whether the content is the same.

Basic Functions of DataCheck