In the first query, the filtering predicate is expressed on the CHAR column "Zip" generated by the XMLTABLE function.
在第一个查询中，过滤谓词是在由xmltable函数生成的char列“Zip”上表达的。
For our example, item_id is a char column that stores only numeric characters, as we indicate in the following statement.
对于我们的例子，item_id是一个char列，它只存储数字字符，如以下语句所示。
If you know the UTF-8 encoding of a character, you can also use this method to enter Unicode characters in a char or VARCHAR column.
如果知道字符的UTF - 8编码，也可以用这种方法在CHAR或varchar列中输入unicode字符。
The CHAR data type provides a performance boost because the database knows exactly how big every CHAR column will be and can make certain performance optimizations when reading or writing the data.
CHAR数据类型有助于性能提高，因为数据库确切地知道每个char列有多大，所以在读写数据时就可以执行某种性能优化。
The "name" column will be a CHAR (30), set to NOT NULL, and have a unique index on it.
“name”列的类型是CHAR(30)，不允许为空，而且根据此列建立了一个索引。
For instance, a String attribute of an entity could be implemented as a CHAR, VARCHAR, or TEXT type of column.
例如，可以将实体的String类型的属性实现为CHAR、VARCHAR或text类型的列。
For example, if you store the following five Chinese characters in UTF-8, you need to define a table column at minimum with char (15).
例如，如果以utf - 8格式存储以下5个中文字符，那么至少需要用CHAR(15)定义一个表列。
Byte indicates that the column will have byte length semantics. Char indicates that the column will have character semantics.
BYTE代表该列以字节计算长度，CHAR代表该列以字符计算长度。
Byte indicates that the column will have byte length semantics. Char indicates that the column will have character semantics.
BYTE代表该列以字节计算长度，CHAR代表该列以字符计算长度。
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