sql count
/*COUNT(column_name) will return the number of rows from the column
that are not NULL*/
SELECT COUNT(column_name)
FROM table_name;
/*COUNT(*) will return the number of rows from the table*/
SELECT COUNT(*)
FROM table_name;sql count
/*COUNT(column_name) will return the number of rows from the column
that are not NULL*/
SELECT COUNT(column_name)
FROM table_name;
/*COUNT(*) will return the number of rows from the table*/
SELECT COUNT(*)
FROM table_name;how to get column count
/**
* Get the column count
* @return count of column the result set have
*/
public static int getColumnCount(){
int columnCount = 0;
try {
ResultSetMetaData rsMetaData = rs.getMetaData();
columnCount = rsMetaData.getColumnCount();
} catch (SQLException e) {
System.out.println("ERROW WHILE GETTING COLUMN COUNT " +e.getMessage());
}
return columnCount;
}Copyright © 2021 Codeinu
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