v0.1.3 版本更新：

• 修复一个排序bug
• 调整优化实现，减少内部复杂度

gosql 是一款开源的 操作mysql类库， 支持用golang方式书写复杂sql。

• 特有的风格写法
• 支持嵌套的复杂sql
• 支持读写分离
• 支持延时链接
• 结构映射
• 事务支持
• 多数据库实例
• 用例即文档
• 条件插件机制

代码方便，实现 87% 的测试覆盖 试图提供优质的代码供开发者使用

其sql 构建库可单独使用 实现自行构建复杂sql

如：

s := gosql.NewSQLSegment()
    s.Flag("DISTINCT")
    s.Field("*")
    s.Table("tbl1.t1")
    s.Where("t1.status", "0")
    s.Where("name", "jack")
    s.Where("[!=]nick", "tom")
    s.Where("[in]role1", []string{"1", "2", "3", "4"})
    s.Where("[!in]role2", []string{"1", "2", "3", "4"})
    s.Where("[in]card1", 1)
    s.Where("[!in]card2", 1)
    s.Where(func(s *Clause) {
        s.Where("[>]age", "20")
        s.Where("[<]", "50")
    })
    s.Where("v1 = 1")
    s.Where("[#]v2 = ?", 2)
    s.Join("tbl3", "a", "=", "b")
    s.Having("class", "one")
    s.Where("[~]desc", "student")
    s.Where("[!~]desc", "teacher")
    s.Where("[exists]my_card", "select 1")
    s.Where("[!exists]my_card2", func(s *SQLSegments) {
        s.Table("tbl2.t2")
        s.Where("t2.id", 10000)
    })
    s.GroupBy("class","group")
    s.OrderBy("score desc", "name asc","age")
    s.Limit(30)
    s.Offset(10)
    s.ForUpdate()
    fmt.Println(s.BuildSelect())

构建出如下sql：

SELECT DISTINCT *
FROM `tbl1`.`t1`
    JOIN `tbl3` ON `a` = `b`
WHERE (`t1`.`status` = ?
    AND `name` = ?
    AND `nick` != ?
    AND `role1` IN (?, ?, ?, ?)
    AND `role2` NOT IN (?, ?, ?, ?)
    AND `card1` IN (?)
    AND `card2` NOT IN (?)
    AND (`age` > ?
        AND `age` < ?)
    AND v1 = 1
    AND v2 = ?
    AND `desc` LIKE ?
    AND `desc` NOT LIKE ?
    AND EXISTS (
        SELECT 1
    )
    AND NOT EXISTS (
        SELECT *
        FROM `tbl2`.`t2`
        WHERE `t2`.`id` = ?
    ))
GROUP BY `class`, `group`
HAVING `class` = ?
ORDER BY `score` DESC, `name` ASC, `age`
LIMIT 10, 30
FOR UPDATE