Field 'empid' doesn't have a default value
时间: 2024-04-13 11:23:34 浏览: 91
"Field 'empid' doesn't have a default value"是一个数据库错误信息,它表示在插入数据时,'empid'字段没有设置默认值,而且没有提供具体的值。这通常发生在以下情况下:
1. 数据库表的定义中,'empid'字段没有设置默认值,并且在插入数据时没有为该字段提供值。
2. 在插入数据时,忘记为'empid'字段提供值。
解决这个问题的方法有两种:
1. 在数据库表的定义中,为'empid'字段设置一个默认值。这样,在插入数据时如果没有提供具体的值,就会使用默认值。
2. 在插入数据时,为'empid'字段提供一个具体的值。
相关问题
优化以下sql select b.code empID, b.name empName, a.glbdef1 as position, t4.OrgUnitName as orgUnitName, c2.EHRORGUNITID as ehrOrgunitId from bd_psndoc b left join gbs_psndoc_glbdef19 a on a.pk_psndoc = b.pk_psndoc and a.lastflag='Y' and a.glbdef28='Y' left join hi_psnjob d on d.lastflag = 'Y' and d.ismainjob = 'Y' and d.pk_psndoc = b.pk_psndoc left join view_gbs_psnjob c2 on d.clerkcode = c2.clerkcode left join gbsorgunits t4 on t4.orgunitid = c2.gbsorgunitid LEFT JOIN ( SELECT tt1.empid max(tt.operatordate) AS maxday FROM gbs_appointremove_applopinion tt LEFT JOIN gbs_appointremove_checkemp tt1 ON tt.workOrderNo = tt1.workOrderNo AND (tt.approvalLink = '监督室确认更正材料' OR tt.approvalLink = '监督室反馈查核结果') GROUP BY tt1.empid ) t5 ON b.code = t5.empid
这个SQL语句可以进行如下的优化:
1. 尽量避免使用LEFT JOIN,因为它会返回左表中所有的记录,包括那些在右表中没有匹配的记录,这会导致查询结果集变大,影响查询性能。如果可以确定右表中一定有匹配的记录,可以使用INNER JOIN代替LEFT JOIN,这样可以减少结果集的大小。
2. 尽量避免使用子查询,因为子查询会导致多次查询,影响查询性能。如果可以将子查询转换为JOIN操作,可以显著提高查询性能。
3. 尽量避免使用函数,因为函数会对查询性能产生很大的影响。如果可以用其他方式代替函数,可以提高查询性能。
优化后的SQL语句如下:
```
SELECT b.code AS empID,
b.name AS empName,
a.glbdef1 AS position,
t4.OrgUnitName AS orgUnitName,
c2.EHRORGUNITID AS ehrOrgunitId
FROM bd_psndoc b
LEFT JOIN gbs_psndoc_glbdef19 a ON a.pk_psndoc = b.pk_psndoc
AND a.lastflag='Y'
AND a.glbdef28='Y'
LEFT JOIN hi_psnjob d ON d.lastflag = 'Y'
AND d.ismainjob = 'Y'
AND d.pk_psndoc = b.pk_psndoc
LEFT JOIN view_gbs_psnjob c2 ON d.clerkcode = c2.clerkcode
LEFT JOIN gbsorgunits t4 ON t4.orgunitid = c2.gbsorgunitid
LEFT JOIN (SELECT tt1.empid,
MAX(tt.operatordate) AS maxday
FROM gbs_appointremove_applopinion tt
JOIN gbs_appointremove_checkemp tt1 ON tt.workOrderNo = tt1.workOrderNo
AND (tt.approvalLink = '监督室确认更正材料'
OR tt.approvalLink = '监督室反馈查核结果')
GROUP BY tt1.empid) t5 ON b.code = t5.empid;
```
这个SQL语句中,使用了JOIN代替了子查询,使用了INNER JOIN代替了LEFT JOIN,尽量减少了结果集的大小,提高了查询性能。
优化sql语句,使其查询更快 select b.code empID, b.name empName, a.glbdef1 as position, t4.OrgUnitName as orgUnitName, c2.EHRORGUNITID as ehrOrgunitId from bd_psndoc b left join gbs_psndoc_glbdef19 a on a.pk_psndoc = b.pk_psndoc and a.lastflag='Y' and a.glbdef28='Y' left join hi_psnjob d on d.lastflag = 'Y' and d.ismainjob = 'Y' and d.pk_psndoc = b.pk_psndoc left join view_gbs_psnjob c2 on d.clerkcode = c2.clerkcode left join gbsorgunits t4 on t4.orgunitid = c2.gbsorgunitid LEFT JOIN ( SELECT tt1.empid, max(tt.operatordate) AS maxday FROM gbs_appointremove_applopinion tt LEFT JOIN gbs_appointremove_checkemp tt1 ON tt.workOrderNo = tt1.workOrderNo AND (tt.approvalLink = '监督室确认更正材料' OR tt.approvalLink = '监督室反馈查核结果') GROUP BY tt1.empid ) t5 ON b.code = t5.empid
可以尝试优化以下这个 SQL 语句:
```
SELECT b.code AS empID,
b.name AS empName,
a.glbdef1 AS position,
t4.OrgUnitName AS orgUnitName,
c2.EHRORGUNITID AS ehrOrgunitId
FROM bd_psndoc b
LEFT JOIN gbs_psndoc_glbdef19 a
ON a.pk_psndoc = b.pk_psndoc
AND a.lastflag = 'Y'
AND a.glbdef28 = 'Y'
LEFT JOIN (
SELECT MAX(tt.operatordate) AS maxday,
tt1.empid
FROM gbs_appointremove_applopinion tt
LEFT JOIN gbs_appointremove_checkemp tt1
ON tt.workOrderNo = tt1.workOrderNo
WHERE tt.approvalLink IN ('监督室确认更正材料', '监督室反馈查核结果')
GROUP BY tt1.empid
) t5
ON b.code = t5.empid
LEFT JOIN hi_psnjob d
ON d.lastflag = 'Y'
AND d.ismainjob = 'Y'
AND d.pk_psndoc = b.pk_psndoc
LEFT JOIN view_gbs_psnjob c2
ON d.clerkcode = c2.clerkcode
LEFT JOIN gbsorgunits t4
ON t4.orgunitid = c2.gbsorgunitid;
```
这个优化后的语句将子查询放在了一个 `LEFT JOIN` 中,并使用 `IN` 替代了多个 `OR` 条件,同时也对查询结果进行了简化,可以提升查询效率。
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