fun_js_functions/jsonToSQLUnion.js at main · devgl96/fun_js_functions · GitHub

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functionjsonToSQLUnion(data){
constallKeys=Array.from(
newSet(data.flatMap(obj=>Object.keys(obj)))
);

returndata.map((item,index)=>{
constvalues=allKeys.map((key)=>{
constval=item[key];
if(val===null||val===undefined)return'NULL';
if(typeofval==='string')return`'${val}'`;
returnval;
});

// Cabeçalho (primeiro SELECT) com alias
if(index===0){
constaliased=values.map((val,i)=>`${val} AS ${allKeys[i]}`);
return`SELECT ${aliased.join(', ')}`;
}

// Demais SELECTs sem alias
return`SELECT ${values.join(', ')}`;
}).join('\nUNION\n')+';';
}