我有一个巨大的tabledb，有1.6M条目。我想替换
SELECT `Type` FROM `my_db` WHERE `Type` != "a" AND `Type` != "b" AND `Type` != "c"
上面的查询给了我接近7K的行。
我希望通过上述查询更新所有选定的行，以便将Type重新分配给值"a"。
我该怎么做？
答案 0 :(得分：2)
您将使用body{
background-color: #E0F2F7;
font-family: 'Roboto', sans-serif;
font-size: 16px;
color: #333333;
font-size: 2em;
}
table.main-table td.rank, table.main-table th.ranktitle{ border-left: solid 1px #CCCCCC; }
table.main-table td.visual, table.main-table th.visualtitle{ border-right: solid 1px #CCCCCC; }
td { border-bottom: solid 1px #CCCCCC; }
@media screen and (min-width: 1280px){
table.main-table td.rank, table.main-table th.ranktitle{ border-left: solid 2px #CCCCCC; }
table.main-table td.visual, table.main-table th.visualtitle{ border-right: solid 2px #CCCCCC; }
td { border-bottom: solid 2px #CCCCCC; }
}
@media screen and (min-width: 1960px){
table.main-table td.rank, table.main-table th.ranktitle{ border-left: solid 3px #CCCCCC; }
table.main-table td.visual, table.main-table th.visualtitle{ border-right: solid 3px #CCCCCC; }
td { border-bottom: solid 3px #CCCCCC; }
}
@media screen and (min-width: 2560px){
table.main-table td.rank, table.main-table th.ranktitle{ border-left: solid 4px #CCCCCC; }
table.main-table td.visual, table.main-table th.visualtitle{ border-right: solid 4px #CCCCCC; }
td { border-bottom: solid 4px #CCCCCC; }
}
html, body{
height: 100%;
}
table.main-table{
width: 98%;
margin: auto;
height: 100%;
}
table.main-table tr{
box-shadow: 10px 10px 5px #888888;
margin-bottom: 1%;
}
table.main-table tr, table.main-table td{
min-width: 10%;
}
thead{
width: 100%;
height: 15%;
}
tbody{
height: 85%;
width: 100%;
}
table.main-table, table.main-table th{
text-align: center;
}
table.main-table tr.LeaderboardHeader{
height: 100%;
background-image: linear-gradient(to bottom, #CCCCCC 0%, #999999 100%);
font-weight: normal;
margin: auto;
}
table.main-table th{
padding: 0.25% 0;
height: 100%;
}
table.main-table td{
padding: 0.25% 0;
background-image: linear-gradient(to bottom, #FFFFFF 0%, #FFFFFF 100%);
}
table.main-table th.ranktitle{
text-align: right;
width: 3%;
padding-right: 0.5%;
}
table.main-table th.nametitle{
width: 45%;
}
table.main-table th.visualtitle{
width: 37%;
text-align: left;
padding-right: 2%;
}
table.main-table th.steptitle{
width: 15%;
padding-right: 2%;
}
table.main-table td.rank{
text-align: right;
width: 3%;
padding-right: 0.5%;
text-align: right;
}
table.main-table td.name{
text-align: left;
}
table.main-table td.name span{
padding-left: 5%;
}
table.main-table td.steps{
font-weight: bold;
text-align: right;
padding-right: 2%;
}
table.main-table td.visual{
padding-right: 2%;
}
table.main-table td.name img{
width: 60px;
height: 60px;
}
.progress{
margin: auto;
height: 60px;
}
/* Shadows */
td{
box-shadow: 5px 5px 5px #555555;
}
tr.empty{
opacity: 0;
height: 100%;
}
tr.empty td, div{
height: 16px;
}
：
update