Question

我有一个查询，如果我的两个字段等于零或为null，我想显示结果。

foreach ($query=$db->query("SELECT *,
t1.CMD_ID, t1.CMD_CLT_RS, t1.CMD_CLT_ID,
t2.CLT_ID, t2.CLT_CODE
FROM sous_commandes 
LEFT OUTER JOIN commandes AS t1 ON (t1.CMD_ID=sous_commandes.SCMD_CMD_ID)
LEFT OUTER JOIN client AS t2 ON (t2.CLT_ID=t1.CMD_CLT_ID)
WHERE SCMD_FRN_ID = '$frn_id' AND SCMD_FACT_TOTAL_HT = '0' || IS NULL AND SCMD_FACT_TOTAL_TTC = '0' || IS NULL
ORDER BY STR_TO_DATE(SCMD_DATE, '%d/%m/%Y') DESC") as $donnees):

我尝试使用|| IS为NULL但不起作用。没有显示结果。谢谢。

Answer 1

变化

SCMD_FACT_TOTAL_HT = '0' || IS NULL

到

(SCMD_FACT_TOTAL_HT = '0' OR  SCMD_FACT_TOTAL_HT  IS NULL)

当然SCMD_FACT_TOTAL_TTC也一样。

修改

您也可以

COALESCE(SCMD_TOTAL_HT, '0') = '0'

Answer 2

foreach ($query=$db->query("SELECT *,
t1.CMD_ID, t1.CMD_CLT_RS, t1.CMD_CLT_ID,
t2.CLT_ID, t2.CLT_CODE
FROM sous_commandes 
LEFT OUTER JOIN commandes AS t1 ON (t1.CMD_ID=sous_commandes.SCMD_CMD_ID)
LEFT OUTER JOIN client AS t2 ON (t2.CLT_ID=t1.CMD_CLT_ID)
WHERE SCMD_FRN_ID = '$frn_id' AND SCMD_FACT_TOTAL_HT = '0' || isnull(SCMD_FACT_TOTAL_HT) AND SCMD_FACT_TOTAL_TTC = '0' || isnull(SCMD_FACT_TOTAL_TTC)
ORDER BY STR_TO_DATE(SCMD_DATE, '%d/%m/%Y') DESC") as $donnees):

使用或在where子句中为零或为null

2 个答案: