Question

使用Oracle文档（Link here）我尝试使用JSON数据查询表中是否存在某些值。

列中的示例JSON数据如下所示：

[{ “ID”： “14843”}，{ “ID”： “14103”}，{ “ID”： “16632”}，{ “ID”： “14776”}，{ “ID”：” 14658 “}，{” ID “：” 14426 “}，{” ID “：” 14838 “}，{” ID “：” 14834 “}，{” ID “：” 14804 “}，{” ID “：” 14803 “}，{” ID “：” 14802 “}，{” ID “：” 14801 “}，{” ID “：” 14779 “}，{” ID “：” 14767 “}，{” ID “：” 16013 “}，{” ID “：” 15980 “}，{” ID “：” 15979 “}，{” ID “：” 15978 “}，{” ID “：” 15977 “}，{” ID “：” 15976 “}，{” ID “：” 15975 “}，{” ID “：” 15974 “}，{” ID “：” 15973 “}，{” ID “：” 15972 “}，{” ID “：” 15971 “}，{” ID “：” 15970 “}，{” ID “：” 15969 “}，{” ID “：” 15968 “}，{” ID “：” 15967 “}，{” ID “：” 15966 “}，{” ID “：” 15965 “}，{” ID “：” 15964 “}，{” ID “：” 15963 “}，{” ID “：” 15962 “}，{” ID “：” 15961 “}，{” ID “：” 15960 “}，{” ID “：” 16012 “}，{” ID “：” 15903" }]

我想得到这个JSON数据包含某些特定值的行。我试过像这样的查询：

SELECT * FROM SOME_TABLE WHERE json_exists(JSON_COLUMN, '$.id?(@ == 16632)');

根据文档，语法是正确的，但Oracle SQL Developer给了我错误

ORA-40442: Błąd składni wyrażenia ścieżki JSON
40442. 00000 -  "JSON path expression syntax error"
*Cause:    The provided JavaScript Object Notation (JSON) path expression
           had an invalid syntax and could not be parsed.
*Action:   Provide JSON path expression with the correct syntax. Error at Line: 1 Column: 76

我甚至尝试从文档中复制'$.LineItems?(@.Part.UPCCode == 85391628927)'，但仍然会出现同样的错误。你能告诉我这种语法有什么问题吗？

编辑：我尝试过的所有版本（都出现了同样的错误）：

SELECT * FROM SOME_TABLE WHERE json_exists(JSON_COLUMN, '$.id?(@ == "16632")');
SELECT * FROM SOME_TABLE WHERE json_exists(JSON_COLUMN, '$?(@.id == "16632")');
SELECT * FROM SOME_TABLE WHERE json_exists(JSON_COLUMN, '$?(@.id == 16632)');

Answer 1

SqlConnection sqlConnection1 = new SqlConnection("Your Connection String");
SqlCommand cmd = new SqlCommand();
SqlDataReader reader;

cmd.CommandText = "select user_id from users where user_name='" + Session["usern"] + "'";
cmd.CommandType = CommandType.Text;
cmd.Connection = sqlConnection1;

sqlConnection1.Open();

reader = cmd.ExecuteReader();
// Data is accessible through the DataReader object here.

sqlConnection1.Close();

我猜@Alex Pool是对的，你没有运行12.2

在Oracle中查询JSON数据会产生语法错误

1 个答案: