android - 在 SQLITE 中查询“COALESCE”

Question

这是PhoneGap android的表格：

tx.executeSql("如果不存在则创建表 user_prayers('id' INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,'prayer_id' TEXT ,'user_id' INTEGER,'date' DATETIME,'status' INTEGER)",[],successCB,错误CB）；

并使用循环插入行：

function insertInUserPrayerTable() {
                        db.transaction(function(tx)
                         {for(var i = 0;i<5;i++)
                        {checkedValueofCheckboxInsertArray.push('INSERT INTO user_prayers '

                             + '(prayer_id,user_id,date,status)'
                                + ' VALUES("'
                                + checkedValueofCheckbox[i]
                                + '","'
                                + window.localStorage
                                        .getItem("userid") + '","'
                                + $('#datepicker').val() + '","'
                                + statusofNamaz[i] + '");');

                console.log("array values:"+checkedValueofCheckboxInsertArray);
                        }
                         },errorCB,successCB);
            runInsertQuery();
                     }
function runInsertQuery() {
                        db
                                .transaction(
                                        function(tx) {
                                            for (var i = 0; i < checkedValueofCheckboxInsertArray.length; i++) {
                                                tx
                                                        .executeSql(
                                                                checkedValueofCheckboxInsertArray[i],
                                                                [],
                                                                successCBrunInsertQuery,
                                                                errorCBrunInsertQuery);
                                            }
                                        },errorCB,successCB);

                    }


$('#showbtn')
                            .off('click')
                            .on('click',
                                    function() {
                                //getRecord();
                                        db
                                                .transaction(
                                                        function(tx) {
                                                            tx.executeSql("SELECT a.date, COALESCE(a.status,'') AS 'fajr', COALESCE((SELECT b.status FROM user_prayers b WHERE b.date = a.date AND b.id != a.id LIMIT 1),'') AS 'zohar' FROM user_prayers a WHERE user_id='"+window.localStorage.getItem("userid")+"' GROUP BY a.date",[],successCBofselect,errorCBofselect);},errorCB,successCB);

但它没有返回我的状态，而相同的查询在 sql fiddle 中工作正常：

Answer 1

答案来自sqlite：有没有办法在 SELECT 子句中创建条件 OR / COALESCE？

SELECT CASE WHEN (TitleSP = '' OR TitleSP IS NULL)
            THEN COALESCE(TitleEN, '')
        WHEN (TitleEN = '' OR TitleEN IS NULL)
            THEN TitleSP
        ELSE (TitleSP || ' / ' || TitleEN)
   END AS Title, 

...