{"id":42833,"date":"2024-07-30T13:23:44","date_gmt":"2024-07-30T13:23:44","guid":{"rendered":"https:\/\/web.valuesite.cl\/index.php\/2024\/07\/30\/vender-servicios-b2c-en-una-empresa-de-tecnologia-copy\/"},"modified":"2024-08-13T16:43:24","modified_gmt":"2024-08-13T16:43:24","slug":"buenas-practicas-en-el-uso-de-sentencias-transact-sql","status":"publish","type":"post","link":"https:\/\/web.valuesite.cl\/index.php\/2024\/07\/30\/buenas-practicas-en-el-uso-de-sentencias-transact-sql\/","title":{"rendered":"Buenas pr\u00e1cticas en el uso de sentencias Transact-SQL"},"content":{"rendered":"<section class=\"wpb-content-wrapper\"><p>[vc_row full_width=&#8221;stretch_row_content_no_spaces&#8221; z_index=&#8221;0&#8243;][vc_column][vc_single_image image=&#8221;42835&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221;][\/vc_column][\/vc_row][vc_row el_id=&#8221;row-content-page&#8221; css=&#8221;.vc_custom_1674585036169{margin-top: -6% !important;margin-bottom: 0px !important;padding-top: 32px !important;padding-right: 16px !important;padding-bottom: 32px !important;padding-left: 16px !important;background-color: #ffffff !important;}&#8221; z_index=&#8221;1&#8243;][vc_column][vc_row_inner el_id=&#8221;row-header-post-etiqueta&#8221; el_class=&#8221;header-post-etiqueta&#8221;][vc_column_inner][vc_column_text]<div class=\"blog-post-top-bss\"> \r\n\r\n\t\t\t\t\t\t<div class=\"entry-content post-content\"> \r\n\t\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<div class=\"post-meta date-color\">\r\n\t\t\t\t\t\t\t\t\t<div class=\"entry-meta single-post-meta clearfix gem-post-date\">\r\n\t\t\t\t\t\t\t\t\t\t<div class=\"post-meta-right\">\r\n\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"post-meta-likes\"><a href=\"#\" class=\"zilla-likes\" id=\"zilla-likes-42833\" title=\"Like this\"><span class=\"zilla-likes-count\">9<\/span> <span class=\"zilla-likes-postfix\"><\/span><\/a><\/span> \r\n\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t\t\t<div class=\"post-meta-left\" style=\"display: flex;\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"post-meta-author div-display-none-bss\">Por Pamela Iturrieta<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"sep div-display-none-bss\"><\/span> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"post-meta-date fecha-1-bss\">  \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-infotext-wrap position--left vertical--center\" style=\" \"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-infotext-icon\"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-icon gem-simple-icon gem-icon-pack-material gem-icon-size-custom\"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-icon-inner\" style=\"font-size: 16px;\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"gem-icon-half-1\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"back-angle\">\uf1cc<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"gem-icon-half-2\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"back-angle\">\uf1cc<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-infotext\"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-infotext__title\"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"title-customize title-default\" style=\"\"><span>julio 30, 2024<\/span><\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t  \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\tclass=\"sep \"><\/span> \t\t\t\t\t\t\t\t\t\t\t\t<span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-infotext-wrap position--left vertical--center\" style=\" \"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-infotext-icon\"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-icon gem-simple-icon gem-icon-pack-material gem-icon-size-custom\"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-icon-inner\" style=\"font-size: 16px;\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"gem-icon-half-1\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"back-angle\">\uf547<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"gem-icon-half-2\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"back-angle\">\uf547<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-infotext\"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"gem-infotext__title\"> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"title-customize title-default\" style=\"\"><span><span class=\"post-meta-categories \"><a href=\"https:\/\/web.valuesite.cl\/index.php\/category\/articulo\/\" title=\"Ver todos los art\u00edculos en Art\u00edculo\">Art\u00edculo<\/a> <span class=\"sep\"><\/span> <a href=\"https:\/\/web.valuesite.cl\/index.php\/category\/valuesite\/\" title=\"Ver todos los art\u00edculos en Valuesite\">Valuesite<\/a><\/span><\/span><\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div> \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n \r\n\r\n\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t\t<\/div><!-- .entry-meta -->\r\n\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t \r\n \r\n\t\t\t\t\t\t<\/div>\r\n \r\n<\/div>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner el_id=&#8221;content-articulo-bss&#8221;][vc_column_inner][vc_column_text]<\/p>\n<h5><span class=\"light\" style=\"color: #000000;\">Buenas pr\u00e1cticas en el uso de sentencias Transact-SQL<\/span><\/h5>\n<p>[\/vc_column_text][vc_column_text]Transact-SQL, o T-SQL, es el lenguaje de manipulaci\u00f3n de datos utilizado por SQL Server y otros sistemas de gesti\u00f3n de bases de datos que se adhieren a las extensiones de SQL de Microsoft. Es crucial escribir consultas eficientes y mantenibles para optimizar el rendimiento y la legibilidad del c\u00f3digo. Aqu\u00ed les dejamos algunas buenas pr\u00e1cticas recomendadas:<\/p>\n<h6><strong>\u00a0 \u00a01.- Usar expl\u00edcitamente <\/strong><strong>JOIN<\/strong><strong>en lugar de comas en la cl\u00e1usula\u00a0<\/strong><strong>FROM<\/strong><\/h6>\n<ul>\n<li><strong>Bueno:<\/strong>SELECT * FROM Clientes JOIN Pedidos ON Clientes.IDCliente = Pedidos.IDCliente<\/li>\n<li><strong>Evitar:<\/strong>SELECT * FROM Clientes, Pedidos WHERE Clientes.IDCliente = Pedidos.IDCliente<\/li>\n<li><strong>Raz\u00f3n:<\/strong>La sintaxis\u00a0JOIN\u00a0es m\u00e1s clara y menos propensa a errores, especialmente en consultas complejas con m\u00faltiples uniones.<\/li>\n<\/ul>\n<h6><strong>\u00a0 \u00a02.- Evitar el uso de\u00a0SELECT *<\/strong><\/h6>\n<ul>\n<li><strong>Bueno:<\/strong>SELECT IDCliente, Nombre, Apellido FROM Clientes<\/li>\n<li><strong>Evitar:<\/strong>SELECT * FROM Clientes<\/li>\n<li><strong>Raz\u00f3n:<\/strong>Especificar columnas mejora el rendimiento al reducir la carga de datos y ayuda a evitar problemas cuando la estructura de la tabla cambia.<\/li>\n<\/ul>\n<h6><strong>\u00a0 \u00a03.- Utilizar alias para mejorar la legibilidad<\/strong><\/h6>\n<ul>\n<li><strong>Ejemplo:<\/strong>SELECT c.Nombre, p.FechaPedido FROM Clientes AS c JOIN Pedidos AS p ON c.IDCliente = p.IDCliente<\/li>\n<li><strong>Raz\u00f3n:<\/strong>Los alias hacen que las consultas sean m\u00e1s f\u00e1ciles de leer y escribir, especialmente cuando se utilizan m\u00faltiples tablas.<\/li>\n<\/ul>\n<h6><strong>\u00a0 \u00a04.- Parametrizar las consultas para evitar la inyecci\u00f3n SQL<\/strong><\/h6>\n<ul>\n<li><strong>Ejemplo:<\/strong>Utilizar par\u00e1metros en lugar de concatenar strings directamente en la sentencia SQL.<\/li>\n<li><strong>Raz\u00f3n:<\/strong>Mejora la seguridad y el rendimiento al permitir que el plan de ejecuci\u00f3n de la consulta sea reutilizado.<\/li>\n<\/ul>\n<h6><strong>\u00a0 \u00a05.- Usar transacciones para operaciones que modifican datos<\/strong><\/h6>\n<ul>\n<li><strong>Ejemplo:<\/strong>BEGIN TRANSACTION, realizar operaciones de actualizaci\u00f3n,\u00a0COMMIT TRANSACTION<\/li>\n<li><strong>Raz\u00f3n:<\/strong>Asegura la integridad de los datos y permite la reversibilidad en caso de errores.<\/li>\n<\/ul>\n<h6><strong>\u00a0 \u00a06.- Evitar funciones en la cl\u00e1usula <\/strong><strong>WHERE<\/strong><strong>sobre columnas<\/strong><\/h6>\n<ul>\n<li><strong>Ejemplo:<\/strong>SELECT * FROM Pedidos WHERE YEAR(FechaPedido) = 2023<\/li>\n<li><strong>Evitar:<\/strong>(En la medida de lo posible para no perder beneficios de \u00edndices)<\/li>\n<li><strong>Raz\u00f3n:<\/strong>Usar funciones sobre columnas puede impedir el uso de \u00edndices, disminuyendo la eficiencia de la consulta.<\/li>\n<\/ul>\n<h6><strong>\u00a0 \u00a07.- Utilizar comentarios y formato consistente<\/strong><\/h6>\n<ul>\n<li><strong>Ejemplo:<\/strong>Utilizar comentarios\u00a0&#8212;\u00a0o\u00a0\/* *\/\u00a0para explicar la l\u00f3gica compleja.<\/li>\n<li><strong>Raz\u00f3n:<\/strong>Los comentarios y un formato claro hacen que el c\u00f3digo sea m\u00e1s accesible para otros desarrolladores y para futuras revisiones.<\/li>\n<\/ul>\n<h6><strong>\u00a0 \u00a08.- Optimizar las consultas utilizando herramientas de an\u00e1lisis de rendimiento<\/strong><\/h6>\n<ul>\n<li><strong>Ejemplo:<\/strong>SQL Server Management Studio (SSMS) ofrece planes de ejecuci\u00f3n de consultas.<\/li>\n<li><strong>Raz\u00f3n:<\/strong>Los planes de ejecuci\u00f3n ayudan a identificar cuellos de botella y optimizar las consultas para un mejor rendimiento.<\/li>\n<\/ul>\n<p>Implementar estas pr\u00e1cticas no solo mejora el rendimiento de las bases de datos, sino que tambi\u00e9n contribuye a un c\u00f3digo m\u00e1s limpio, seguro y mantenible.<\/p>\n<p style=\"text-align: left;\">Te invitamos a trabajar junto a nuestro equipo de profesionales con amplia experiencia en el desarrollo de soluciones tecnol\u00f3gicas para diferentes industrias, que agregan valor a nuestros clientes.<\/p>\n<p style=\"text-align: left;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Cont\u00e1ctanos a trav\u00e9s de nuestro correo\u00a0<\/span><\/span><\/span><\/span><a href=\"mailto:contacto@valuesite.cl\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">contacto@valuesite.cl<\/span><\/span><\/span><\/span><\/a><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u00a0<\/span><\/span><\/span><\/span><\/p>\n<div class=\"small-body\"><\/div>\n<p>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner el_id=&#8221;row-footer-post-etiqueta&#8221; 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