获取无效的ALTER TABLE选项

Question

这是我错误输出的确切查询

  alter table INDIL_MCAR drop constraint ABOB.INDI_MCAR_PK;

我试图从表中删除唯一的密钥constring。它给了我以下错误。

 ORA-01735: invalid ALTER TABLE option

Answer 1

您不能为约束名称添加前缀...表名称是，但不是约束名称。删除alter table INDIL_MCAR drop constraint INDI_MCAR_PK; ：

var sourceImages = [
	{width: 100, height: 100, toAspectRatio:1/2  },
	{width: 64,  height: 32,  toAspectRatio:1/1  },
	{width: 125, height: 100, toAspectRatio:3/2  },
	{width: 100, height: 345, toAspectRatio:1/3 },
	{width: 345, height: 100, toAspectRatio:1/3 }
];


function calculateNewSize( sourceWidth, sourceHeight, toAspectRatio )
{
	var aspectRatioChange = (sourceWidth / sourceHeight) / toAspectRatio;
	var fitWidth = aspectRatioChange < 1 ? sourceHeight * toAspectRatio : sourceWidth;
	var fitHeight = aspectRatioChange >= 1 ? sourceWidth / toAspectRatio : sourceHeight;

	console.log('(' + aspectRatioChange + ') ' + sourceWidth + " x " + sourceHeight + " -> " 
				+ toAspectRatio + ' -> ' + fitWidth + ' x ' + fitHeight); 
}

sourceImages.forEach(function(source) {
	calculateNewSize(source.width, source.height, source.toAspectRatio);
});