wp_postMeta 数据表是wordpress中存储文章附带信息的，除了一些特定的情况下，里面的数据是没有用的，下面在给出几条语句让你的 wp_postMeta 表变得干净。
数据库。然后执行下面的sql语句清理和优化 wp_postMeta 数据表中的垃圾文件和缓存。
下面两条语句测试安全删除无危险。
Crayon-5c891c946a67e403900980" class="Crayon-Syntax Crayon-theme-classic Crayon-font-monaco Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mouSEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;">
Crayon-toolbar" data-settings=" mouSEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;">Crayon-title">
Crayon-tools" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;">
Crayon-button Crayon-nums-button" title="Toggle Line Numbers">
Crayon-button-icon">@H_301_8@@H_301_8@
Crayon-button Crayon-plain-button" title="Toggle Plain Code">
Crayon-button-icon">@H_301_8@@H_301_8@
Crayon-button Crayon-wrap-button" title="Toggle Line Wrap">
Crayon-button-icon">@H_301_8@@H_301_8@
Crayon-button Crayon-expand-button" title="Expand Code">
Crayon-button-icon">@H_301_8@@H_301_8@
Crayon-button Crayon-copy-button" title="Copy">
Crayon-button-icon">@H_301_8@@H_301_8@
Crayon-button Crayon-popup-button" title="Open Code In New Window">
Crayon-button-icon">@H_301_8@@H_301_8@Crayon-language">Shell@H_301_8@@H_301_8@
Crayon-info" style="min-height: 16.8px !important; line-height: 16.8px !important;">@H_301_8@
Crayon-plain-wrap">@H_301_8@
Crayon-main" style="">Crayon-table">
| Crayon-nums " data-settings="show"> Crayon-nums-content" style="font-size: 12px !important; line-height: 15px !important;"> Crayon-num" data-line="Crayon-5c891c946a67e403900980-1">1@H_301_8@ Crayon-num Crayon-striped-num" data-line="Crayon-5c891c946a67e403900980-2">2@H_301_8@@H_301_8@Crayon-code"> Crayon-pre" style="font-size: 12px !important; line-height: 15px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"> Crayon-line" id="Crayon-5c891c946a67e403900980-1">Crayon-e">DELETE Crayon-e">FROM Crayon-e">wp_postMeta Crayon-e">WHERE Crayon-v">Meta_keyCrayon-h"> Crayon-o">=Crayon-h"> Crayon-s">'_edit_lock'Crayon-sy">;@H_301_8@ Crayon-line Crayon-striped-line" id="Crayon-5c891c946a67e403900980-2">Crayon-e">DELETE Crayon-e">FROM Crayon-e">wp_postMeta Crayon-e">WHERE Crayon-v">Meta_keyCrayon-h"> Crayon-o">=Crayon-h"> Crayon-s">'_edit_last'Crayon-sy">;@H_301_8@@H_301_8@301_8@@H_301_8@ 以下是新尝试的三条语句，前两条危险性不大。最后一条不太清楚目前作用，但是删除后无任何异常。 Crayon-5c891c946a686503502251" class="Crayon-Syntax Crayon-theme-classic Crayon-font-monaco Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mouSEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;"> Crayon-toolbar" data-settings=" mouSEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;">Crayon-title"> Crayon-tools" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;"> Crayon-button Crayon-nums-button" title="Toggle Line Numbers"> Crayon-button-icon">@H_301_8@@H_301_8@ Crayon-button Crayon-plain-button" title="Toggle Plain Code"> Crayon-button-icon">@H_301_8@@H_301_8@ Crayon-button Crayon-wrap-button" title="Toggle Line Wrap"> Crayon-button-icon">@H_301_8@@H_301_8@ Crayon-button Crayon-expand-button" title="Expand Code"> Crayon-button-icon">@H_301_8@@H_301_8@ Crayon-button Crayon-copy-button" title="Copy"> Crayon-button-icon">@H_301_8@@H_301_8@ Crayon-button Crayon-popup-button" title="Open Code In New Window"> Crayon-button-icon">@H_301_8@@H_301_8@Crayon-language">Shell@H_301_8@@H_301_8@ Crayon-info" style="min-height: 16.8px !important; line-height: 16.8px !important;">@H_301_8@ Crayon-plain-wrap">@H_301_8@ Crayon-main" style="">
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