MySQL中的binary类型使用操作

本文主要向大家介绍了MySQL数据库之MySQL的binary类型操作，通过具体的内容向大家展现，希望对大家学习MySQL数据库有所帮助。

示例数据表：

CREATE TABLE test_bin (  bin_id BINARY(16) NOT NULL) Engine=InnoDB;

INSERT INTO test_bin(bin_id) VALUES(UNHEX(‘FA34E10293CB42848573A4E39937F479‘));
INSERT INTO test_bin(bin_id) VALUES(UNHEX(?));

或

INSERT INTO test_bin(bin_id) VALUES(x‘FA34E10293CB42848573A4E39937F479‘);

查询数据：

SELECT HEX(bin_id) AS bin_id FROM test_bin; SELECT HEX(bin_id) AS bin_id FROM test_bin WHERE bin_id = UNHEX(‘FA34E10293CB42848573A4E39937F479‘);SELECT HEX(bin_id) AS bin_id FROM test_bin WHERE bin_id = UNHEX(?); SELECT HEX(bin_id) AS bin_id FROM test_bin WHERE bin_id = x‘FA34E10293CB42848573A4E39937F479‘;

bin_id
--------------------------
FA34E10293CB42848573A4E39937F479

备注：使用MySQL内置的 UUID() 创建一个函数返回 BINARY（16）类型的UUID值

CREATE FUNCTION uu_id() RETURNS binary(16) RETURN UNHEX(REPLACE(UUID(),‘-‘,‘‘));

或

CREATE FUNCTION uu_id() RETURNS binary(16) RETURN UNHEX(REVERSE(REPLACE(UUID(),‘-‘,‘‘)));

使用：

INSERT INTO test_bin(bin_id) VALUES(uu_id());

范例1：

Connection conn = null; Statement stat = null; ResultSet rs = null; try {  conn = JDBCUtils.getConnection(map);  String sql = "select HEX(RECID) AS recid,STDNAME AS stdname ,HEX(RESID) AS resid from jyyt";  stat = conn.createStatement();  rs = stat.executeQuery(sql);  while (rs.next()) {  String recid = rs.getString("recid");  String staname = rs.getString("stdname");  String resid = rs.getString("resid");  System.out.println(recid + "---" + staname + "---" + resid);  } } catch (SQLException e) {  e.printStackTrace(); } finally {  JDBCUtils.closeConnection(conn, stat, rs); }

SELECT y.UNITID AS unitid, y.UNITNAME AS unitName, y.WARNINGTYPE AS warningType FROM GXJT_YJ AS y LEFT JOIN md_org AS m ON m.RECID = y.UNITID LEFT JOIN PMS_COMPANY_INFO AS p ON m.RECID = p.UNITID WHERE HEX(m.parents) LIKE '%66F7B47C80000101D5E8ABF15CD9DA73%' AND y.WARNINGTYPE = 'REGISTRATION_DIFFERENT'